My ‘92 Klein Performance also had this BB. Worked great with Ritchey Logic (made by Sugino) triple cranks for me for over 38,000 miles, and my son is still using it with a Dura-Ace double crankset in a 9-speed setup, still going strong. Chainline was fine with both.
I’d imagine others in this community will know of other cranksets that use that spindle length or something close. A WTB post in the C&V For Sale sub-forum will probably turn up something that will fit your needs.
AFAIK, Sugino doesn’t use a proprietary taper, unless that’s what you consider JIS to be. Their cranks are widely used on all sorts of bikes. I’m using a Sugino AT (very popular among C&V-ers) on an SKF BB, and used their popular Sugino XD on son’s wife’s bike with a Shimano BB.