SRAM X-7 3sp front shifter and Shimano Deore front derailleur. Been a while since I rode with these, but I don't recall any problems, they worked fine together.

SRAM X-7 3sp front shifter - $10 obo
Shimano Deore front derailleur FD-M591, 34.9 clamp - $10 obo
Or both together - $15

Plus shipping as needed, or local pickup