gettin parts can be quite difficult now, especially good condition body parts, especially doors, bonnets, fenders....the older it is, the harder and good condition engines. If you wana get 1, find 1 with good condition body and chasis. The floorboards are not the crucial part, the chasis frame and overall body shape is. Do not go for shiny paintjobs or chrome engines. They are nothing but pure rubbish. They add nothing to the value of the car. Cheap repairs are often hidden under new paint coats.
Get someone who is familar to look with. As with any cars, especially Continental cars like VWs, Citroens, Alfas, MUST get 1 preferably with history or better enthusiast OWNER. You just cannot tell what had happened / done to the car previously. The list is too long to put here.
Good luck.
By the way, I am thinking of selling my ride. check out the car for sale.
new parts are currently still readily available, but those are limited to general parts. and they are all made in Brazil and quality is thrash.. NEw engines are available, but at RM12K for a 50bhp engine, I would just advise you to spend your money elsewhere.