I just search out studios and apply, it's a bit out of date but GameDevMap has pretty much been the only tool I used for my last 2 jobs. Another good list of studios is the Polycount Job Census
Theres a guy on here that has a new gamedevmap style list setup that uses Google maps and should be a lot more up to date! cant find the thread but heres the link! https://maps.google.com/maps/ms?msid=205433213486745599629.0004d6f9c6ac8957a5971&msa=0&ll=49.382373,-26.894531&spn=111.693308,270.527344