I have a 1990 (I think - s/n 202Y09) Yo Eddy up on craigslist (Denver, CO). I've owned the bike since new (purchased at Cambria Bicycle Outfitters in 1991 or so) and I think the frame is a 1990. Take a look and hit me with an email if you're interested. My first preference would be a local sale, cash, but if that fails, maybe we can work something out (Lots of lookers over the past week and free ride requests, but it's not sold yet). I have more images - email the pic you want and I can get it.
http://denver.craigslist.org/bik/866247482.html
http://denver.craigslist.org/bik/866247482.html