The above number is a good number for Matt. I was able to contact him last may and placed my order. I ordered his cartridge kit & replacement springs. Although he thought he would be able to ship in a couple of weeks it was 10-12 weeks before I got my order, it was worth the wait and he made some adjustments for the extra time involved.
I wouldn't rule Matt out as an option, especially if you can do the work youself or have a local shop perform the work for you. As @betoney & @2and3cylinders have said what you get for the price is great and he is very knowledgeable, but he has a very demanding day job and he really needs to improve on his commutation with his customers.
With it being winter now might be a good time to try him. Good luck with what ever you decide. It will be a great improvement.