Rob;
As you probably know, Giacomo is the head man and is a Perazzi guru. People who know and deal with Giacomo directly sometimes get a little different perspective of the services offered.
If you email them and ask for a price list, you'll get a prompt reply and find they do much more than service Perazzis. Even so, I suspect the list is not comprehensive; for instance, under barrel work, they list boring, polishing and correcting dents and bulges but don't mention choke/cone alterations which they've done for me in the past and I suspect they still do.
They are wonderful people to deal with and the only shop in the country I wholeheartedly endorse.
Got a quick reply from Giacomo today, but unfortunately it seems they won't do this work on damascus barrels. The search continues.