I may have some of these parts, but I know I don't have a working shift lever. My parts are packed away from another two months or so. Try dropping a request over on the forum at OldGMCtrucks.
I really only have a few of the bronze bushes and seals left over, the kit came with a lot of extra seals i didnt need or use, let me know if you ever want a look.
are you looking for 55-59 GMC trucks and parts?
Mike Morrison aka Pontirag
has a lot for sale going very cheap, he's getting ready to post them for sale here on PY