this guy did a great job on these uprights and the price is reasonable . looks like he has a few and will most likely put more up in the future.

link to uprights with 3rd roller

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=384&item=2713422033&rd=1

Link to dryer stands without 3rd roller

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2713425106&category=384