Parts are out there...even for the early '65-'67 cars.
I use the Maestro (www.hcpresearch.com) for engine parts and support.
There are several web sites that have junks or parts cars.
www.pap-parts.com in Georgia is a good source.
Also, Automobile Atlanta (www.***********.com) has a 912 Catalog; they also have parts cars.
Good luck, and happy motoring.
Dean
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south pole station
'67 912 Targa SRW