Shirley,
We just got a catalog today from Penny's and there is one in there for $49 any size but they are only 1-1/2" thick. Is that what yours is? I've seen them from 2 - 4" thick and so I was wondering if the 1-1/2 would be thick enough.
I have looked on Overstock too but I've not seen them on there for a very good price. I know Sams has one, but it's a queen. So there you are.
mac