Chicago Muscle just sent me an email letting me know they now carry/repro the door boots that go from the cowl to the door for pw/pdl cars. Cost is $12 each. More info, email chimuscle@aol.com
I wonder if it has the 2 small holes at each end for the plastic pins that help hold the boot to the body and door?
I think you can get those from any trim shop. Maybe the same size as the ones found in weatherstrip kits. You can visit www.mrgusa.com and see if he carries them. I think I saw them in his catalog. I don't have it with me now to confirm.