you may want to address this question to IDEA directly even though I have never heard that this organization has gotten involved in such specific projects. Here are the contacts:
IDEA Health & Fitness Association
10455 Pacific Center Court
San Diego, CA 92121
Phone: (858) 535-8979, ext. 7
Toll-free: (800) 999-4332, ext. 7
Fax: (858) 535-8234
I would suggest, though, that you contact the organization ‘Let’s Move’ of our First Lady Michelle Obama http://www.letsmove.gov/. They may have a grant program for projects such as yours.
I would check with my local municipality on that. I’m sure they can point you in the right direction. I would also try what Karin & Harris suggested. Good luck – I hope the kids get the new floor!