Yeah unfortunately I don't know of any other OC boats besides the Riviera. There are lots going out of San Pedro/Long Beach, which is barely north of OC. But am I understanding correctly that you want to go out on Friday, 12/31? That's maybe going to be tricky; most boats only do Saturdays and Sundays unless you arrange a private charter. (They're happy to go out during the week; it's a matter of finding enough divers to fill the boat.) If it is Friday, your best bet might actually be to hop on the ferry to Catalina (which you can do from Newport Beach, Long Beach, or San Pedro) and go to the dive park. I know you said you want a boat dive, but honestly the dive park has pretty much everything that's good about boat diving. If it's Saturday or Sunday you're looking for, let me know and I'll see what I can dig up.