Originally Posted by LesterOfPuppets

Yep. Has to be a Denali.

If you're pretty lucky you could find some 1999-ish 3x7 Shimano RSX shifters for $40 or so. Or you could get new Microshift 3x7 for $80

https://www.universalcycles.com/shop...0&category=162

Unfortunately I think you'd have to switch to a road triple front derailleur to get the front shifting right.

Maybe $25 for a road triple derailleur. You need to figure out the diameter of the seattube before shopping for those. going bigger than the seattube can be OK if you get a good shim.