79 days later, this shows up out of the blue in the mail:
Over everything that has happened, all the emails, two failed refunds and all of my wasted time, I finally got something for my money. Upon closer inspection of the adapter, it is clear that it is a very well machined and toleranced unit. However, it was also clear that this adapter that I bought "new" was actually used.
Notice the markings by the holes where the locking washers marred the surface, and also the dirt around the circular locating edge.
The adapter also has lots of nice patina and oil covering the exposed areas.
I would like to think these blemishes were only from test fitting the adapter to assure it was machined correctly, but the severity of the dirt and blemishes makes me think otherwise. Even though the unit is clearly not in "new shape," it is not compromised in way. I am going to just call it even at this point; trying to get a different adapter would be more of a headache than I care to deal with. All this being said, the adapter did fit nicely once the bellhousing received the necessary grinding to clear the input seal cover and two adapter bolts.
My cliff notes of the entire experience:
1. Was I happy with the quality of the product for the money I spent?
Yes, except for the fact that it was clearly not new.
2. Was I happy with the waiting time for the product?
No.
3. Was I happy with the seller's communication?
No.
4. Did the seller do his part to make the buyer happy?
No.
5. Would I buy from this seller again?
No, not if forced to by gun point.
Thanks everyone for your help, especially William. I wouldn't be surprised if it was these threads and William's and others’ outreaching that finally shook Jake into delivering on this 79 day transaction.
-Mike