Originally Posted by
juvela
The ELDI brand of bicycle tools from Germany makes a kit for this. It includes reamer and oversized tap for the helicoils which come with the kit. Have done several and they turned out fine. This is a common repair in the trade and one would expect all bike shops to have this kit or a similar one.
Thanks for the reply but I am specifically looking for a workshop, either in the US or preferably in the UK, which undertakes such repairs. As mentioned in my post, I am aware such kits are available but find them prohibitively expensive when I just want to do a single crank arm.