I think it was either on the message boards he said and/or an old interview.

Oh yes - if I remember correctly, Sam Johnson has also stated he voices Gaspard DeVole.

He did have some lines in Valencia 2, at least in the side quests. Check out the Martin chambers quest.

Also, I'd check out lmdb if you haven't already for this guide. It has some VAs and their...

No, but there are similar sounds in their voices to confirm. I know he has a website, but I don't know where else to find him.

Robert Kraft also voices Wing Chun and Louis LeBisque.