#1
Is there any places in California where I can just rock up with my guitar and a drawing of what I want inlayed on the fingerboard and have them make it for me?
#2
any place in california? california is big i don't think your going to be riding around coast to caost of california. Anyways...
contact them
http://www.guitardoctor.net/contact.php
http://guitartechcorner.com/contact.htm
http://www.guitartech.us/
http://www.ultracase.com/contact.php

and last but not least
http://www.google.com/search?sourceid=navclient&ie=UTF-8&rlz=1T4TSHB_enUS381US381&q=guitar+tech+california


EDIT: BTW it's not going to be cheap.