This would not be hard to replicate in Icon-O-Matic from scratch. The current logo is even already isometric, though in a different direction than the standard Haiku style. Though given the name Furnace I’d be tempted to do something with a chip in a fire or furnace.
If no one else gets to it before I do, I can make one. I want to dust off my icon skills, the last time I made some for Haiku was probably 15 or more years ago, haha. I was even showing off some of them to my son the other day. Made long before he existed (he is now 8) 