Pretty late to the reply here, but I've had various Pinarelli that are 6806 or similar non angular contact bearings in the headsets, so it's entirely possible.
I did just chuck a couple of 6806s is it. Doesn’t seem like a fantastic solution, whole thing felt a bit fragile as I was pressing them in, but whatever, it’s not my bike!
Pretty late to the reply here, but I've had various Pinarelli that are 6806 or similar non angular contact bearings in the headsets, so it's entirely possible.