Stern Rails
I had asked Rudy about Stern Rails for the 22. He said they weren't usually fitted, but he could get them. There is also a company called "Stainless Outfitters" in Canada that has made them, and can make them specifically for the 22. I asked, having one myself. Both SO, and Rudy said they'd run around 3-400 bucks, depending on layout, and size. I'll bet shipping would hurt a lot, though...