We have a donated fat tire bike and the sq tapered spindle in the caged bearing

bottom bracket is toast. One of the cone edges is worn thin and the spindle is bent.

Bottom bracket Shell = 73mm
Spindle length = 164mm
Marked Type 9C
best as we can measure the left side is 56mm; center is 58mm; right side is 50mm +/-

Cannot find any 164mm bottom brackets, hoping maybe someone (coop or non-profit shop) has one salvaged from a bicycle.

Thanks