I will watch this thread with interest…

Club member Jeff Fralick works at Hilland Motor Cars in southeastern PA, they have built a nice "Alger" and done some pretty extensive work on a couple of Jeff’s Tigers. Wayne there at Hilland has been restoring "other cars" for a long time.
It is basically a 2-man shop. Might be worth a call 610-399-oh-eight-nine-five.

Ragtops and Roadsters in PA also indicated some Sunbeam experience when I spoke with them a while back:

Ragtops & Roadsters

Good luck with whatever route you decide to take…