Does anybody know what model Audio Aero DAC/Player included it's first USB input?

I currently own a Prima mkll DAC. Love it to death, but I want to stream via USB from my Mac these days. So I’m considering a search for a used Audio Aero unit that has that input port.

Glad to hear the company Vermeer Audio has bought Audio Aero and can service their newer and past models. Will be asking Vermeer as well in an email, but was just curious also to see if there are any other Audio Aero fans out there.

I am priced out of the newer models, but am wondering if I can find a used USB unit for a sane price.