Update Dec 08, 2015
New pistons and rings came in!
I also found an engine builder. A couple of people on my local forum recommended this place near my apartment called Autosport Seattle. I called them and asked various questions about their equipment, tolerances and basic practices. They provided good information, better than what I received from a very popular shop I called earlier in the day. I decided to check out Autosport Seattle in person and I wasn't very impressed by the environment. The lobby was a mess, with books and parts lying around. I then got to talk to one of the machinists and he was immediately familiar with the SR20. I told him my engine was a little different, being that it's an iron block, not aluminum. I guess he's also the builder of Walker Wilkerson's motor and is used by another reputable shop for all their machine work. I think this is the place for my motor!