The XAC can be plugged into the back of the Quadstick via a Brook Wingman XE or XE2 adapter, which converts the XAC into a DS4 controller, which the Quadstick can use. All the inputs from the XAC are available within the Quadstick configuration spreadsheet.
T2's are available in the US and Poland according to the Console Tuner website. You can use a service like
myus.com to give them a US address to ship to for the US option.
I've got several as well.