If it's got a square taper BB currently, then I want to believe that it probably is a also a BSA threaded shell. So you really can just look for any crankset here or chainset there. That also comes with a BSA threaded BB. That can include 2 piece cranks that are a cinch to install. Or cranks that use octalink v2 or ISIS type BB cartridges.

Which any of those are easier to deal with than the old and unfortunately still with us square taper bb.