Are are some interior kits and weather stripping kits better than others?

Laurel Mountain Mustang advertises good prices on interior kits. So does Texas Mustang. Do all distributors pretty much get their stuff from the same suppliers or does quality differ from place to place? How about weather stripping? :shrug:

If quality does differ, who do you guys recommend for the best stuff? I'm all about getting the best buy, but I'm more interested in getting good quality parts that will hold up more than just a year or two.
 
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