You can find the rim you wanted a 16" AeroHeat in 349 size listed for $39.95 from Gaerlan's Bike Shop outside of San Francisco. I have had them build me a wheel a couple years ago. It was well built, shipped promptly, and at a fair price. Try www.gaerlan.com and go to the bike parts section under 349 wheels. They are a shop that caters to recumbent builders. I've mail ordered from them occasionally over several years and always was satisfied.