'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.
I've been to Pieces d'Autos Classiques J.R. west of Montreal, off the island. Bought several parts (seat belts, accelerator pedal, weatherstrips, etc.) They're in St. Clet. 450-456-3582.
Will take a ride one day to check out the place you suggested; didn't know it existed.