ok so i got an old car 1994 delsol and the weather stripping around the front of the targa roof is starting to go a lil bit, sometimes it leaks durring rain

i knw i can probably go to a shop and get it replaced for an arm annd a leg, but is there somewhere i can buy the strips and do it myself or like something i can coat the current strippin in to make it a little bit thicker like new-ish?

thanks,
nick