I've actually very involved in the classical guitar scene here locally. We (the Minnesota Guitar Society) bring a number of international artists to the US every year for our concert series. We've never had Jason though. I remember Jason from when he won the GFA competition at a tender age of 17. This was back in 1992 or something.
I'm not a builder, but I know quite a few. If you find yourself on the other side of the bay, check out
http://www.gspguitar.com . The best guitar sheet music mail order house in the US. It has a showroom with quite a few nice guitars as well.