I made mine ..... used my old metal ironing board and screwed on a piece of plywood. Stapled on flannelette for some padding. Then a washable cover. All for zero dollars!!!(yes, it had value, but being that it was all just sitting around, no out-of-pocket expense at the time!!
So head on out to a thrift store for your ironing board, stop by for some plywood, and then you get to do a FART for the flannelette (or batting) and the cover.