Mike, don't wait any longer. If he has an issue with the machine shop, thats not your problem, it's his. You delt with him, not the machine shop.
He's stalling.
Check with USPS on how long you can let this go before they cannot do anything with it.
I say this because I waited too long on a wing I purchased, and the guy ( yes is on this forum) kept stalling, so I thought I would be patient.
My problem is that I wated past 12 months before I took it up with Canada Post, they informed me that after 12 months, they could not do anything about. Sounds like a crock with me, but thats how it went down.
Don't wait!, Take action NOW!!!
------------------
Autocross=A trip to the Grocery Store