Quite straightforward - a decent bike mechanic would do it, drilling a pilot and easy out.
You could try this guy - https://www.threaddoctorservicesltd.co.uk/
I wouldn't do the drill and easy out on an exhaust stud. Have had bad experiences.
@hanford started
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Quite straightforward - a decent bike mechanic would do it, drilling a pilot and easy out.
You could try this guy - https://www.threaddoctorservicesltd.co.uk/