I'm thinking here both repairing a non-functioning or damaged McI amp or just bringing it back to specs with new caps, etc.
I did a Search here and found some options in a couple of threads but no dedicated thread on the topic so thought I'd start one to see if there are additional viable options that were missed.
I know Brad Sarno has done right by many here updating and upgrading our McI amps.
One post referenced ctech-electronics-store (eBay name). Another referenced lionrr12 (eBay name).
And my salesman at my local high-end stereo store (which sells new McIntosh equipment and also Focal speakers which I bought and love 'em) highly recommends Audio Classics in New York.
But that's all I could find on my own.
"For me, I think the only danger is being too much in love with guitar playing. The music is the most important thing, and the guitar is only the instrument." Jerry Garcia