Need a gunsmith for my BSA R10 SE (I'm in the USA)

I applied some purple locktite on the hammer spring adjuster and put it back. Except that I forgot to put the spring. As a result, I screwed the hammer adjuster too much and if fell down inside.

I need to find a gunsmith to not only correct my mess-up, but also to tune the rifle. I have already installed a huma reg, so the consistency is good. But I'm not happy with it's accuracy (0.5" at 30Y and .75" at 50Y). 

I contacted rat works, but they don't work with the US. So I need a competent smith that works with US based customers.

Any recommendation is appreciated.