Want to Buy WTB: Beater Bronica SQ Zenzanon 80mm 2.8 S for parts

I have an 80mm S that has fungus inside the rear (inner) couplet. I'm looking for an 80mm S parts lens that has a good rear couplet. Condition of rest of lens doesn't matter - scratches on external glass surfaces, bad shutter, dents, etc. are fine.