I've been mesing with 914's for abour 15 years and find interior pieces easy to find. I have a basement full of interior stuff. Seems to me the business to get into at this time is the 914 to 6 conversion. 6 engines are very reasonable but the parts to install them are more than you pay for an engine. Exhaust headers are more than an engine. Stay in touch, I have a real 914-6 and am building a 2.4L/6 autocross car now. My son can do most of the fabrication but it is still expensive. I'll be driving to South Florida at Thanksgiving (from Atlanta) so keep in touch if you need any 914 parts , I can build any engine configuration you want, I have wheels, 916 bumpers, exhaust parts, doors ....you name it.
Al Meredith
ljgmere@aol.com