Modarmory sells an adapter that goes from a PVS eyepiece to any lens with a 46mm thread. Astronomy people might know of other options.
I have a suspicion that one of the spotting scope adapters from Phone Skope might work. I'll need to try it. It is for cell phones though, not dedicated cameras.
They do advertise some sort of an adapter specific to PVS-14, but their website is nucking futs, so I would suggest contacting them with questions before pulling the trigger on anything.
ILya