Denis Havlena's instructions for winding bass strings are here:

http://www.ehhs.cmich.edu/~dhavlena/make-stg.htm

Another site provides a calculator for selecting the right material, length and tension for unwound strings at various pitches

http://www.cs.helsinki.fi/u/wikla/mus/Calcs/wwwscalc.html

http://www.cs.helsinki.fi/u/wikla/mus/Calcs/ADrawer10.html

Maybe not exactly what you werer chasing Don, but it may help.

Regards, John