I found some contact info for Skyflight Instruments. They actually aren't in business anymore but the guy that ran the company, Mike Cannon, has moved to Maine. I talked to him about 6-8 months ago and he said he has a lot of the old manuals, wiring diagrams and some spare parts. Contact him if you need some help.
Mail:
M.R. Cannon/Skyflight
P.O. Box 357
South Berwick, ME 03908
Shipping:
M.R. Cannon/Skyflight
46 Brattle Street
South Berwick, ME 03908
ph: (207) 384-5865
e-mail: SkyFlyte@aol.com
Hope this helps, good luck,
Oly Olson
N20VV
http://home.earthlink.net/~olyolson1/index.html