Thanks! The panniers can be made to fit the tourfella mounts if you install the mounting pucks yourself.
ADVDepot is the USA retailer. There is a lot of info about the panniers at
this thread on ADVRider. I got 28L and 35L individual panniers and installed the mounting pucks (the thickest option, 18mm) myself to fit them snugly to the tourfella mounts.