Thanks GW2K!
I called mazdastuff (Austin, TX) - they quoted $49.98 for the adapter, and $9.20 for the gasket. I said (gtfo)!! Grey Ghost posted on 2/25 that he got the parts for $38/$2.94 from mazdastuff.
I'm in Michigan - which dealer did you go for the parts? How'd you get wholesale.
Thanks.