does anyone know how to contact mitch singerman

hello all i did a google search and could not come up with a way to contact mitch singerman, he is known for his mods on audio gear, can anyone help
I haven't called in a while, but I have a phone:
(310) 823-5145
(310) 823-5145. I dealt with him a few months ago so that number should still work.
looking into modding my 834p, can any one comment on differences in stock and a modded 834. and thanks for the contact number,
He just moved in that phone number is disconnected