Yep, i'm still here......
Welcome to ribnet!
I should pre-empt this and say I'm going entirely form memory here, but you'll find a lot of the clamp / swivel / gearbox parts are shared with most post '79 two stroke Yams between 50 & 90 Hp (there are odd exceptions). Some of the electrical bits (e.g. coils) might be carryover / shared, but as I never needed to replace them I don't know off the top of my head.... Incuidentally, is yours pull start? That's the difference between the "BM" & the "BE".
Mine died of corrosion, (spent years on a mooring before I got it and nobody thought to replace the anodes
) Before I disposed I stripped it of the new parts. Somewhere in the depths the "for sale" directory is a post of with the list of goodies if you're interested. Prices now negotiable! All used, but most not seen more than about 10 hrs on the engine before the corrosion got terminal & the rebuild was abandoned.
If it's spares your after, David Anderson Marine (Dundee) has about 4 (5 now!) that he was breaking for spares.