I once bought one of those cheap metallic ironing sheets (22x44). It is a piece of metallic fabric, a layer of foamy stuff (!) underneath it, and a flimsy layer of something that started disintegrating right away.
What made that thing totally useless was the outer binding (some kind of binding anyway). It made the whole thing curl upward.
I took the metallic fabric, replaced the foam with cotton batting and used that to cover a small wooden ironing board (just a cut down from some underflooring).
The left-over metallic fabric is ideal for messy ironing jobs.
The ironing sheet only cost US $ 7.95 (amazon.com). So I got quite a bit of mileage out of it so far.