Man, I think ESC repair services have dwindled. There are a few repairing their own, given that they had the resources. But you will find most of the time, even the manufacturer may ask you to buy a new product instead. One thing I give Novak, they had the refurbished items tab. meaning you could get a refurbished ESC, Motor or combo at a fraction of the cost, with a warranty. I destroyed a Sensor Board on an 2000KV Orion before, and had the worst luck with Horizons support - now I run a different brand.

Not to stir you in the wrong direction, but perhaps a used XR8 would be your safest bet, given how great they are, and many readily available in the BST.