Interior rain seal question

Well i searched around and came up with NORTON 82761 Gray caulk strip (about $9 for 2 lb box) which is what I believe was in there in the first place. I am going to pick up a box of it later today. As far as plactic I bought a roll of 4 mil plastic from Home Depot and it is really close in thickness to the original. I do have the bag my headliner came in which is close to the matress wrapper (just too small). If anybody else has anything else let me know. I have found that the little things in a "restoration" are the hardest things to come by, i'm sure you all know the pain