I used one of the Marchand bows (and a Martin bass) for my show at the Berlin bass conference. I was very impressed with the bow (German, in my case). Ian and Peter (of Tom's shop) said they were made in Banbury (England)... obviously not by "George Marchand"... Andrew McGill would be my guess... but that's pure speculation on my part.
Louis
http://www.bowmakermcgill.co.uk/#/biography/4512413818
I added McGill to the list at around 3k; his website says his bows start around 2300 USD.
If McGill does make the Marchand bows, maybe he uses factory frogs or somesuch to keep the cost down.
EDIT: Mr. McGill has informed us that he is not the maker of the "Marchand" bows.