I purchased a large board at my local WalMart Supercenter that may be the board you are talking about. It is 18 in wide and 49 in long for the Ironing Surface and then there is a iron stand on th end of that it has a hanger rack that raises up for the freshing ironed shirts, pants, etc. There is also a metal rack or shelf about 1/2 down underneath, mine came with a fabric basket attached to it with velcro. I know I have had this one about 5 years and it is very sturdy. My DH plans to take some plywood and make me a big board 24 inches wide and the full length of this board for ironing large yardage and quilts..
Take a tape measure with you and measure the boards at your local WM. They may have it in stock and you don't realize it.