Has anybody out there ever heard of a fighter called Milan Prosenica?
He won some world title back in the 80s and was joint head of ProAm wing chun with Nick Smart. That website seems not to be updated for ages & just wanted to know what hes doing now.
The Wing Chun community is so divided and stratified that it shouldn't be too hard tracking down someone, or their instructor.
You just have to ask the right people. There are a few WC/WT/VT guys here, maybe one of them can answer this for you.