As always, info comes too late. I purchased an input shaft and surf sump from Transwreck in Springwoodish area. They are automatic gearbox dismantlers (spelling?) and they have parts for EVERY type of auto.
Again, bit late but also usefull for others.
Cheers.
PS. I paid $300 for an input shaft, surf sump and v6 chain t'case for my conv.