LRI did the fluting of the bolt, their prices are listed online I believe at $45 per fluted bolt. Shipping was about $15 with insurance. I live in Michigan and had a local shop do the stock work and slurry blasting. Look up Odin’s Workshop. They also have a Facebook and Instagram page which displays their work. Very reasonably priced but I would ask that you inquire on pricing with them directly. From what I've seen most cerakote companies charge $100 to coat a single stock and then an extra $50 per additional coat. Thats what I would consider reasonable for the bake version. Odin’s did this all with one single coat. They also did the oven bake version which I was informed (and I think confirmed online) is more durable than the air application alternative for polymer and plastics. I dealt with one of the owners his name was James.
