Doug, if you're willing to make a trip across the bay, Auto Innovations in Milpitas does TOP NOTCH work. He's worked on my personal s2k before, as well as mount/balance tires, and does a lot of work for our community. Orlando really knows his stuff.
For a custom alignment it's like $60-70, but I'm not sure about corner balancing. I can recommend someone to you for that as well but he does it on the side for track guys, not a professional operation like Auto Innovations.