Don,
What parts do you need?
If you are looking to complete the set of stuff for a 1976 some suggestions:
* You should track down a vinyl blue box air compressor...that is what was being fitted to RoW cars in 1976 (not the white plastic Weber air compressor).
* 1976 color charts (1976 Standard Color Chart, Publication #1080.14...or...1976 Special Color Chart, Publication #1081.14)
* 1976 Priesliste...there are TWO versions depending when your car was produced: 1976 Priesliste Modelle 1976 (1st German Pricelist), Publication #1086.II ...or... 1976 Priesliste Modelle 1976 (2nd German Price List), Publication #1091.II
* 1976/77 911/Carrera 3.0/Turbo Technical Specifications Book (1st Edition, October 1977), Publication #4224.20 2,5 M X/77. This is the English version...there is a German version if you prefer.
* 1976 Porsche 911 Carrera/Turbo Accessories Brochure, Publication #1087.14 (German/English/French/Italian)
* 1976 Porsche 911/Carrera/Turbo Sales Brochure (German), Publication #1083.10
* 1976 Full Line Color Brochure, Publication #1123.10 (German)
* A correct 1976 date coded Porsche Service Dealer Directory, Publication #4101.00
* 1976 Porsche factory calendar
Hope that helps in your quest!
This seller has a number of items on eBay for ok prices...if you are patient you can find things cheaper, but often they are available for more than what this seller is asking:
1976 porsche from wt-911 | eBay
Best of luck.
Ryan (Seattle)