I've got several of these as well, Tiarella and love them. Perfect for my square vat, and its size.
I'll also be making beauforts in a large (up to 20 gallons), direct-fired vat, and I'd like to get a hold of a traditional cutting harp. There's an outfit out of Austria that does them
, but quite pricey and I'm hopeful of finding one domestic to the States, which Alpkäserei mentioned is a possibility, so we'll see.