Secondhand Outboards and Parts

[twizzler3b]

I need either a crankcase for a Yamaha f100 outboard, or maybe a 60-115hp motor if I find a good value on a secondhand motor.

The Yamaha dealer in Phuket wants 50k for the used part, or 90k for new, which seems like a crazy price to me.  So I'm looking for other options/markets/sites.  I've looked around facebook marketplace etc.  I actually even ordered the part on ebay from a USA seller, but after a month of waiting ebay refunded me saying they couldn't ship it internationally, with no reason given.  

Just looking for some help finding a fair price on the part so I can get the boat back in the water before my dad visits.  

Thanks everyone.