I'm nearing the finish line on my 55 (or as close as you can get with one of these things) and I think you can say I have lost a good bit of sleep over weatherstripping. It's a nightmare and I don't care what anybody says, there is no quick fix.
I bought everything I could from Cabe because in my opinion it's the best you are going to get. I think it's as good as OEM would be if you could still get it and I thought the price was right. Especially for the quality.
Now don't get me wrong when it comes to Slocruisers but I only bought what I had to. He is the only source for some things. Super nice guy and I truly believe he is putting out the best product he can but I personally don't think it compares to the quality I got from Cabe. Add in the prices he is charging and I was expecting a "picture perfect" product. The items I got are working exactly like they are supposed to and they fit like they should but for the price, I wanted OEM look and feel. We'll see how they hold up. Like I said, he was a nice fellow to deal with and for the items you can't get anywhere else, go for it.
Another problem I would have with buying a kit is the molding that goes around the door openings. If you go through the weatherstripping section it's one of the most talked about pieces. Believe me, I know why. After 30 some odd years nobody's 55 fits into the "cookie cutter" mold anymore. When they came off the line all the doors fit the same so the same stripping worked on all the vehicles. That is not the case now. Nothing fits the same anymore. I tried what was the most recommended and my doors would not close. Perhaps I could have forced them but forget that. Not after all the welding and patching I did. Some will say that it will eventually form under pressure. If you search around the board you will find more than one person has cracked their door trying. No thank you. Luckily I only bought one roll to start with and it all went in the trash can. That would seriously suck if you bought a "kit" and ended up with the same problem of doors not closing. I called Fairchild and they had a piece that I thought would work. Since none of their "common" distributors were carrying it, they sold me 50 feet and I could not be happier.
I have bought from Cabe, Slocruiser, Fairchild, Precision, and JC Whitney. It has been a really big pain in the butt but I really feel that I have put the best package together for my truck. Personally I don't think a package deal can do that or at least it would not have worked for me. It sure would have been a lot quicker though. Please keep in mind that everything above is simply my opinion or experience so take it for what it's worth.