Good news - I love my new PXW-Z280! It even appears to record XAVC-I with XQD cards and an adapter.
Bad News - adapter cards are no longer available. Somehow I missed that fact when I budgeted my purchase.

Searching for 2 adapters. Would appreciate any leads you may have.

Ray, I have a brand new unopened QDA-EX1 that I'd sell for $150.

Doug,

That sounds like a deal! Thank you so much. What is the best way to pay you for it?

Send me a private message and we'll work it out.