I actually have a set of n.o.s window sweeps. But the problem with anything that old that’s been sitting in storage- the rubber gets hard. Mine have stiffened up a bit just sitting in my basement. Finding a newer option may be a good idea
if you have an auto detailing place that deals in Sonax products, Sonax makes a product called "Gummi Pfleger" which is a rubber protectant and sealer which has the reputaton of bringing a lot of aged rubber back to almost new condition. Might be worth a try.