The things I would most like to find are a replacement leather or two for the pump, an air tube, as well as a spare check valve. For the stove I would like a spare surge damper, spare G type jets, and additional priming pads.

Jerry,

I just reread what you asked for and noted the priming pads. Those were a small square of asbestos and considering the hazards of asbestos, I doubt you'll find any. Unless someone has some very old spare parts kits laying around.

The problem with the MSR stoves is that they have been remodeled so many times, it is almost impossible to keep abreast of the changes and the parts associated. That's one reason I haven't messed with mine for many years. Even the Dragonfly I have has had a complete remodel since I bought it. I've pretty much become a lazy man and use a Snow Peak canister stove these days. Light, easy and reliable. I don't climb mountains any more and have not done any winter snow camping in a long time. That was where the MSR XGK was really the best, melted snow and ice in a hurry!
My old Model 9 originally had a white pump, for at least the first 2 pump changes from Larry. The yellow was probably about the 3rd gen. You are right Larry was a great man and a genious to boot. He had a very practical approach to climbing with safety as an important ingedient! Few people today recognize his contributions. He was responsible for the high strength ice axe shafts, the MSR dead man anchors with fixed angles and introduced the climbing world to lithium batteries for cold weather use, long before anyone had heard of a lithium battery.
I still have somewhere around here a bunch of the MSR newsletters which always had some great information in them. I even still have a first generation MSR Gore-Tex parka, now that is OLD!