US outline map
I was looking for a US outline map for a long time as well. All I could ever find was one of the big ones for RVs which were way to big. Now that I've done 49 of the 50 (I doubt I'll be shipping the bike to Hawaii), I'd really just like a smaller sticker to commemorate the accomplishment. The Ironbutt guys have something close, but it requires that it be done in a certain number of days, etc.
If a reasonable sized sticker that allows you to add each state as it is done isn't feasible, maybe commemorative 48 and 49 state stickers could be made.