After 3 hours of searching last week, parts PF-198B and PF-198F were nowhere to be found. I called Tony at BC and discovered they are 6061. I had a piece of stock 6061, so I decided to mill out the brackets. I cut the stock on my bandsaw, planed it down on the CNC mill and cut out the brackets on the CNC. The brackets fit very well, but required 3 hours of my time.