This is the Association of Occupational and Environmental Clinics.
web site contains a list with many more details about these individual
clinics. I have only reproduced the basic contact information here, and
only for those clinics that list expertise in musculoskeletal problems.
I cannot claim that all such clinics are competent and effective in
treating RSI, but they are, at least, more likely to be aware of RSIs
and experienced in addressing them, than the "average" general practitioner.