Thanks. I got the current o-ring I'm using from napa. The ID was right on but I think I need a thinker o-ring. I'll keep looking.
Do you know of a hydraulic repair shop near you? If so they usually have a huge selection of O-rings.
The thing I like about a deep pan is I would think you can run the level a little lower from the gasket and reduce the chance of a gasket/dipstick leak (as long as you lower the pickup too). What's considered to be a deep pan? 3"?