Hi, brand new to the forum. What I've noticed is that there were different door panels used depending on trim level. My 1991 B2200 was a base model with grey interior and my door panels do not go all the way up to the door glass like the the fancier trim models, like the LX. However, my door panels are like new and I park my truck outside all the time. What I"ve noticed is the fancier door panels that go up higher receive much more sun damage and wear damage than mine have. I occasionally see good used door panels on eBay and nice ones are not cheap.
Also they used two different armrests,, short ones for the base models and a longer armrest for the fancy trim models. I have put the longer ones on my base model and they fit and look good. I see the longer LX armrests all the time on eBay.