I think it'd be a good idea if you batter up a wee list of what kind of materials you need incase anyone has anything lying around. I know up until a couple of years ago, for example, we had tons of fabric paint in our loft (no idea where it came from) that we eventually gave to some youth group. So maybe it'd help you guys if folks memories were jogged and they remembered some stuff they had lying about. Worth a try anyway?
Anyway, excellent effort from all involved, keep it up!