I think I got them from mmawarehouse.com a few years ago, I may have gotten the mats separate from the rest of my gear tho, in which case they wouldnt have been from MMAwarehouse.
its more about the density of the foam my zebras are about a inch and a half thick and ive been slammed on them from 6 feet up no dramas (besides the slam )
We have a spare room that my wife uses for her studio but she said she wouldn't mind if I borrowed the space. Did you guys all buy mats online or try any creative (read cheap) solutions.
I've got a 10'x12' from Dollamur. They sell them cheaper then normal with free shipping on ebay. Just do a search, you will find it.