Rick, watch Ebay for trikes. They come up fairly often. The shipping could be rather steep because of the package size. Even a bare trike frame makes for a large box. If you get one have it broken down into two boxes; frame in one and everything else in the other. Trike conversion kits show up from time to time but they're not cheap. Much easier to ship. My trike, purchased in 1974, came wrapped in paper with shipping tag attached to it. No box and no damage. I see trikes advertised in The Gazette, a newsletter published by the Tricycle Association. If you like I can keep you informed of any trikes I see in the future.
Paul Patzkowsky
Longmont, Colorado