Wanted 1 (or 2) Cosworth rod bolts from 2wd 2.0L

im rebuilding a 2.1 Pinto (again) and just 1 of the rod bolts has corrosion, how it got corroded God only knows as the pistons and rods have been in the utility room for a good while.
4 hours with 800 wet & dry and I can still see some pitting so I am not happy to fit it.

i have 2 projects that I need to complete this week and the 2.1 is in the way
any help appreciated