The site ( look at the menu icon in the upper right) does a fair job about telling visitors what they’re doing, web addresses and phone numbers, but not where they are. 🙂
They’re in scenic Bountifiul, Utah near Salt Lake City.

According to the website, the group is also associated with the B-17E/XC-108 project (which is making great progress according to the new edition of the B-17 survivors book, The Final Cut) Desert Rat.

https://m.facebook.com/12595DesertRat/?ref=bookmarks

There is also a large photo of the Harpoon in the latest FlyPast.
It’s apparently a well known UK periodical. 🙂