Daves Discount Motors has G320PUM engines in stock. $319.99.

I have 2 of them, but there's no engine mounts yet. I guess I'll just have to make my own. I'll post some pics when I do.

Several sources already have mounts for them. BH Hanson has them for sure.

$55 from Hanson.

I just looked at the mount from B. H. Hanson. It's only made from 5/32 material, but the plate that comes on the front of the engine is 5/16 thick. I'd hate to buy the mount from Hanson and have them not work because they are too thin.

Motor Mounts are never as thick as the plate a Zenoah comes with. Can't imagine a 5/16" thick mount is needed.
The EZ start is not distance sensitive as long as the starter of coarse isn't bottomed out in the pawl nut.
Of course BH Hansonsn G320PUM mounts work. Plenty all ready in service

I'm gonna go ahead and make my own mounts from bar stock. I've got nothing else to do, and if I make what I want, I can drop the engine way down in the boat.