I sent out an 8x10, LOR, and SASE to David Morrissey on 3/17/14 and received it back 4/23/14! I used the address listed:

David Morrissey
Troika
10A Christina Street
London, EC2A 4PA
UK

I sent out an 8x10, LOR, and SASE to Adam West on 4/8/14 and received it back 4/22/14! I used the Adam West address listed:

Adam West
Adam West Enterprises
400 East Avenue
P.O. Box 3477
Ketchum, ID 83340