I'm pretty sure someone must have the address of his agent, KB. We'd prefer, of course, that home addresses of actors aren't posted in this forum - for obvious security reasons. But someone's bound to know where to direct fan mail.
Why don't you try
The Cain Connection ? It's a wonderful resource for the Dean Cain fan, run by a very friendly FoLC, who probably not only has a fan mail address but lots of other handy info too. And there's a messageboard forum where you could ask, as well.
LabRat
