Unfortunately, there are no other
Suunto bands that will fit the n3. However, some people have had luck with non-
Suunto bands that they got from watch stores. Find a store with a good selection and see if you can find a clerk who can help find some options for you that will fit.
It's not the greatest solution, or the easiest, but for now it seems to be the only option available. Well, other than somehow getting skinnier wrists!