One pair of brand new, never used three point belts. They are not specific to 914s, but will fit most any car.
I bought them here:
http://www.gotbelts.com/relapshwbuen.html
They have a 6.75" buckle end and no door post fitting.
They sell for $82.00 each.
I'm asking $120 for the pair + shipping from Pittsburgh, PA.
Questions, offers, let me know!
-Bob