Don't want to get another thread running...
We had a PVS sight issued for our L1A1 rifles but used an adjustable mount. That's the only US night vision I'm familiar with. Have you got a picture of the PVS 2. I wasn't serious about making repros either!!!!!!!
Our later IIW's had an auto brightness control in the battery cover cap and a dummy inverter cap too. But anyway, if they fit and LOOK the part, then that should be good enough.
I saw an L42/IIW combination at a show in the US and it really attracted a LOT of attention for several hours