Got some parts today.
The rear wheel and caliper showed up as did the dual brake lever...which is a left
brake lever. Arrrrggh!
Went to the bike shop and picked up a 20 tooth rear freewheel, a teflon brake cable for a tandem bike, 12 feet of cable housing, and some ends for the cables and housing.
Also swung by Lowe's and bought a piece of 3/16 in steel to make the caliper bracket.
Got to work tonight polishing the cast caliper housing and mounted the disc and 20 tooth freewheel. As soon as I'm done with this post I'll go polish the other half of the caliper housing. Will have to get inside the crevices with the Dremel tomorrow then clean the housing and wax the thing.