It's been a few years since son played in it but I just did a search using "socal scout league" and most of the familiar teams come up. You probably have to contact them individually. Getting late but for the right player or need, you may find a spot.
If you're not familiar, you'll find lots of very high caliber players in this league. It is run in a showcase format with limited number of batter-per-innings and lots of P rotation. Definitely a different gig if you haven't experienced it before. There is both pro and college scout attendance, depending on the rosters. Lots of scouts at the tourney.