hey guys just letting you guys know about my find. i found a website that has NOS parts and they have 4 speed shifter knobs. as u may know, these knobs are rare and since GM stopped making them they are hard to find in mint condition, especially NOS mint. from this website i got two knobs. one for my truck and i bought another just for a spare since i knew how rare they are.
here is the link to the website page if you are interested in buying a knob!
http://www.gmcpauls.com/manual_transmission.htm
here are some pics of the knobs i have!