This is where you need to post it:
Yorkie Products Wanted! - YorkieTalk.com Forums - Yorkshire Terrier Community
Reason you couldn't post in the For Sale section is that only donating members can post items for sale, and you were probably starting a thread so even though you were looking for an item a new thread in that section would be interpreted as a For Sale.
Good luck on finding the bed you want - there are some talented members on here who would be happy to help you - probably 107Barney could do it for you.