I ended up taking them and having them turned on a layth (spelling). The step that the freeze plug goes up against was not deep enough once it was turned down to where it needed to be so I had him fix that too. I thought I got back to this thread. I found those freeze plugs.....I'm almost thinking that I got a Dorman part #. If anybody needs the part number I'll get it for you.

The part number for the shallow cups(39/64th)Dorman part is 555-067