I worry that the heat from the iron will warp the wood, so I made my own. Here's a link that might help.

Also, if the pad has a lot of "give", it can warp your pressing. A flat board really helps with this.

http://www.daystyledesigns.com/quiltingironingboard.htm

Here's another one that might be a tad easier to make:

http://www.youtube.com/watch?v=2uGVYK-VeNs

I found the cardboard centre from a roll of fabric and covered that with an old blanket and then sewed a fancy cover on it. A fabric handle on one long side makes it easy to carry to workshops, and a long pocket on one flat side just takes my rotary cutting ruler which protects it when travelling. And in my workroom, it drops down alongside my worktable ready to use. Cheap and handy!.