you can order the generic stuff. BUT you have to order the 5/8 tube and get oval instead of round. most generic stuff is 3/4 round and makes it hard to close the door.
this is just a quick search found this at day industries site. I'd go for a smooth tube though like the original. just google Pinchweld weather strip View attachment Rubber_Pinchweld_seal.jpg
I've even seen it in the RT specialties catalog by the foot.(2.00-3.00) per foot) it's not factory cloth wrapper but it works fine to seal your car up. you'll need about 10ft per side to be safe. so 40.00, 60.00 to do both sides.