Have you checked with the local shops to see if they'd donate 5 or 10 per shop? ABA pays half the shop pays half?

How about making them out of Rattan? Simple, cheap, easy, and effective! The bow will outlast there willing to shoot or until they grow into a bigger bow! Plus it looks better then those cheapo blue and red fiberglass bows. Heck for that matter let me know when your in town again, I might be able to wheel and deal a bit with my contacts. Stop on over or shoot me an email!