Hi Jesse,
I had an email back today from his secretary saying that no endostim has ever been implanted privately in the UK, but that he is now offering it - I believe he also does the linx procedure almost daily now as well. I was not given a price, but asked to phone up for more information, I am going to do that next week after I have had my endoscopy and another barium swallow.
I'll keep you up to date on what I find out.