Okay so not mouse mats but coasters, I had mouse mats on the brain when I wrote the heading!
Used xpres mdf coasters which are fine, still got a bunch here, not had a lot of call but got an enquiry the other day for 50 cork backed. I did try some cork ones a while back but cant remember where I got them from, I sort of stuck with the mdf ones as they were half the price so more margin but where are peeps getting their cork backed ones from these days that are of reasonable quality. Thanks