I’ve been looking for craft felt by the yard for a while now. Amazon, for a while, did not seem to have what I was looking for. I came across this the other day. Rainbow Craft Felt in sandstone.
3 yards at 6 feet wide will run you $20.40 US plus shipping of just $1.99. A pretty good deal when you consider how much even Monday Knight game mats cost. You can also get it in olive which makes for a nice grass mat. You can, of course, doll it up with some flock and paint if you are so inclined. Me? I can’t be bothered.