Got some late 90s LX grey STI shifters, think they may be 9s though.
I guess if you are getting shifters AND cassette then switching 8 to 9 speed isnt too much of a bother?
certainly got a few cassettes to chose from, 8 and 9s ranging from just a cassette through to good XT / XTR units.
Shifters: got some STXRC 8 speed rapidfires, some generic shimano 8 speed rapidfires not sure what level but black and work, 8 speed. some silver 750 XT shifters (again 9s), loads of RH and a few LH. How about sachs wavy in grey or red also 8 speed if you would consider a twist shifter.
let me know if anything takes your fancy I can put a price together for you.