There is a companmy in Lincolnton, NC (name escapes me) but they are the WEATHERSTRIP and SEAL guys in the industry.
When we restored my 71 pontiac chieftan, no one else even made the seals, they had 3 quality levels to choose from.
Name was an oxymoron Steelrubber. SoftSteel...something like that.
I will look through some ol albums see if I can find the receipts