Real Estate of Utara: Kickstarter Reward Tier Planning

We're gradually refining the reward tiers for the upcoming Utara kickstarter campaign. We're gathering estimates from various vendors and comparing them to the hard costs of our last dice run. You might recall the last update on these plans, and now some stuff has changed based on the rising costs of postage, manufacturing, etc. Here's the basic rundown so far.

Description
Explore a new world with Utara compass dice. These custom dice show either North, East, South, West, a sun or a moon on each side. They can also be used as normal six-sided dice by counting the stars on each side. Use these dice in "Lost in Utara" for unexpected trips in your role-playing games. Roll them in board games like "Tides of Utara." When you back this project, you also help create the world of Utara. Small pledges create an island, while big pledges create whole archipelagos. Explore the World of Utara with Utara compass dice.

Goal: ~$5000 in 30 Days
Given our experience with the costs of prototyping and the costs of the Writer's Dice Kickstarter, now we have a better sense of what it costs to fulfill without going red.

$1: Citizen
All backers get thanks in the rulebook.
If the campaign is successful, the map of Utara will be released as a high-res PDF to Creative Commons.

$10: Explorer (250 Available*)
You get two Utara dice, enough to play the "Lost in Utara" mini-game.
You also create and name a small island on the map of Utara. (One cell large.)
[International orders add $3 shipping.]

$20: Trader (350 Available*)
You get four Utara dice, enough to play "Expedition to Utara."
You also create and name a big island on the map of Utara. ($20: Two cells. $30: Three cells. $40: Four cells.)
[International orders add $4 shipping.]

$45: Sailor (50 Available)
You get ten Utara dice, enough for two players to play "Tides of Utara!"
You also name an archipelago on the map of Utara.
[International orders add $5 shipping.]

$100: Navigator (5 Available)
You get twenty-five Utara dice. That's a five-player "Tides of Utara" set!
You also name a sea on the map of Utara.
You also get an exclusive Dragon Chow Dice Bag.
[International orders add $10 shipping.]

$500: Cartographer (3 Available)
You get twenty-five Utara dice. That's a five-player "Tides of Utara" set!
Your name is listed in the center of the map as a cartographer. (For example: The lands and seas of Utara as discovered by Lewis & Clark.")
You get an exclusive Dragon Chow Dice Bag.
You also get an exclusive handmade ~26" square fabric map with each hemisphere of Utara printed on either side, brought to you by Dragon Chow Dice Bags!
[International orders add $20 shipping.]

$1000: Crown of Utara (1 Available)
You get twenty-five fifty Utara dice. That's two five-player "Tides of Utara" set!
Your name is listed in the center of the map as the sponsor of the expedition. (For example: "Surveyed for her majesty, Queen Jane Smith.")
You get an exclusive Dragon Chow Dice Bag.
You also get an exclusive handmade ~26" square fabric map with each hemisphere of Utara printed on either side. The whole kit comes in a wooden box, brought to you by Dragon Chow Dice Bags!
[International orders add $20 shipping.]

* And now a math problem...
I have a limited amount of real estate in which to sell of naming rights to islands (one cell) and big islands (two-to-four cells). I have about 640 whole 19mm x 19mm squares in each 24" x 24" hemisphere. I would rather not fill up the whole map with islands. By making only 300 cells available for purchase in each hemisphere, we can ensure that the map doesn't get totally dominated by landmasses. There will always be a little more sea than land.