Blair Companies
5107 Kissell Ave.
Altoona, PA
I am not sure who you would contact to get involved with them over there. We had to send some guy to PA to take some lessons, and had to purchase their repair kit. It was all worth it though.
I would have to second that, Blair is great to work with. I do a lot of service for them on LED gas digits, and I have 3 crews that are Blair Certified. The ladies that work in the service department are very nice!!
I frequently do work for Kieffer Signs, and ICON Identity. They are both very good and easy to work with. On the service side North American Signs is great. It really depends on the project manager you are working with.