Thank you Jim for all the info. I have found the felt kits and the glass bead stuff from many different sources now. The only thing I couldn't find is the guides (at a decent price) --- the dealers are raping us for these 55-59 parts.... $100 for a set of guides that are not even made or retro-fitted for 1-piece glass I think is robbery.... without a gun!
I found the simplest and easiest power window setup for these trucks to be Electric-Life - and the most economical at $214.00 for the set! From Yogis. Part Number #GM5559-K
Easy to install in about 15 minutes each side