Can't provide any information, but your question is one I've asked about nearly ALL the non-Asian "actors" that appeared in Hong Kong cinema during the heady 80's and early 90's. I suppose many of them are still active in martial arts of even movies somewhere, but it would be really cool to see a one-stop resource that provided post-Hong Kong cinema career information for the likes of Saskia van Riswjk (sp???), Kim Maree Penn, Fairlee Ruth Kordick, Dan Vincent, Mark Houghton (didn't this dude try to kill himself or something?), John Salvitti, Stephen Berwick, Eddie Maher, Mark King, Bruce Fontaine, the list goes on and on.
I've seen that Les Gweilos site. Post-Hong Kong info's still a bit light for a lot of these people.
One thing that's been bugging me for a while now is the entry there for Indra Leech. The picture with it is Declan Wong, likely from GOD OF GAMBLERS III: BACK TO SHANGHAI, and quite frankly I couldn't find him in any of the other movies they list there (all Stephen Chow movies) when I watched them. His entry in the HKMDB seems to have been corrected recently (I think?), listing only GOGIII and ONCE A THIEF, which is correct, while INDRA LEECH still gets credit for the Chow movies, although I'm not sure his name actually appears in the credits for all those films. Not even sure what Indra Leech really looks like, actually.