I would be interested in this also.

Most of us have seen or had an Irons, Driver or latterly a Wedge fitting.
But how many of us have actually been fitted for our putters?
Considering that the putter is usually the most used club in the bag, and is the club that will probably save you the most shots in a round, it's really surprising that this isn't given more emphasis.

Going back to your original point, I've heard of places that use a SAM putt studio, and is becoming more popular.

I've always been tempted in buying a new Scotty, but the huge choice of variants, nevermind shaft or even the weight choices makes it a minefield.

The putter can still be very much a "feel" club, and until you've probably used it for dozens of hits or even for a few rounds, you are never sure whether that one you've chosen is the right one for you.

Found one that should be good and offer Scottys

Phil Kenyon Putting offer specific fittings and other bits

kenyonputting.com/.../custom-fitting

Found my Christmas present!

The US has Cameron Showrooms. There doesn’t appear to be any in Europe.

SAM Labs are becoming more popular at other outlets. The US chain Golf Galaxy is one example of locations that do electronic measurements of your swing arc and how close to center do you strike the ball. The amount of data is comparable to a Trackman reading. A whole different game than watching how many putts can you drop in a store putting area. Takes away most of the minefield. At my last fitting, one putter was superior. So he chose a putter for me. It isn’t a Cameron, but it beat them.