I know that alot of people have been looking for the step in harnesses, and the angel wing harnesses that are available form a seller on ebay. I found them, and can tell you that the step in harness is a snap to use, and very comfortable. My little guy likes them.
So for anyone who is still looking-here they are.
http://cgi.ebay.com/ws/eBayISAPI.dll...MakeTrack=true http://cgi.ebay.com/ws/eBayISAPI.dll...tem=4380864073 http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3980929374