IMHO the rarest part is a factory inflation can with freon still in it. And if you replace it with one from Pep Boyz or some such place, first look at the label closely: some will say "WARNING- EXTREMELY FLAMMABLE!! Those inflators use PROPANE as an inflation gas. This is somehow legal in CA and other states. So what you have is essentally a hand grenade in your trunk. One 'cooked off' in a '73's rear trunk after a hard run at high altitude, and it blew the trunklid open, denting it in 3 places, cracking the fiberglas tub floor and shearing the latch.
A second associated problem is if you actually USE such an inflator. A BMW used one in the L.A area to get to a tire shop some years back; the car was on a lift when a worker enlarged the hole with a motorized file before plugging the puncture. A spark against the steel cords wrecked the shop, the BMW, killed him and destroyed two other cars nearby. Do not keep those aftermarket inflater cans!