I'm starting to rebuild a 73 Torpado and during cleaning the bottom bracket I found really bad pitting on one side of the axle bearing race, so looks like a need a replacement. It has a Nervar Star crank and BB and so far I have confirmed it 115 mm length and ISO taper. I measured the BB shell and it came in at 69 mm so that wasn't much help. Both cups tighten to the right and I did find a 36 stamped on the fixed cup so I'm gonna guess it's Italian thread. Does that sound correct? Also, what are the most cost effective options for a replacement? Trying to keep the budget low.

Thanks