ck your local canvas dealer ,he will have mat'ls you can pick from and will weld, glue ,what ever they do so its 1 piece.Then just buy the padding.no seems
Our coach just got a whole floor of Dollumar mats. They are sweet. Not too soft, not too hard. Out of all the mats I've practiced on these are my favorite.
Get the Zebra Combo 1.5in mats. Our Judo club has these and they are great and will allow you to take hard throws and TDs. They are heavy, so if you gotta set them up and put htem away after every practice make sure people don't leave til they're put away :(