if you cant find something locally.. the internet should be able to help you find a place to ship the hardware to get fixed.
be sure you use paypal for a legal receipt in case the person doesnt give you the amp back.
you could use ebay.. sometimes people post their services on ebay for like .99 cents or $1
sometimes they post an ad for $10 and you take that $10 off your final cost of the repair.
google has a national listing for yellow book.
that means you can look for any electrical repair shop that has the telephone number listed.. anywhere in all 50 states.