Where can I find some affordable mats?

I don't want to say "cheap" because a) I'm not paying for them directly and b) I want them to be safe and last a while. Anyway, gym in Pocahontas is looking for some mats for their aerobics studio, either puzzle mats or the fold out jobs. Used is fine (actually preferred, economically speaking) as long as they're in good condition. Need to cover...I'll measure it next week. A decent sized room, but not a full gym by any means.

Obrigado in advanceo