Kubota cylinder head questions?

Hey guys it's been a while since I have been on here but I have a Bobcat 337 mini excavator with a V2003-M-DI-TE2B engine. We took it to the dealer for service with a suspected cracked head. Indeed it was cracked, they said it was not worth repairing and wanted to slap us with a $5000 bill to fix it. The machine is only worth about $15000.

I was wondering if anyone had a good source on where to find a new or remaned cylinder head for this thing. It is a lot easier to justify fixing if I bolt a cheap head on it myself, thanks.

Never seen one off them that didn't need replaced, but only like 4.