Have you tried WWW.poolfelt.com?
Simonis is expensive it is a high end cloth, I wouldn't dare sell Simonis for $214 or less than that, as a retailer you don't make much off of $214, but Rick sells a lot of it and stocks it so it makes sense. $400 isn't insane if you are in the business of making money, that is standard markup for some companies.$214 is about the cheapest you'll find it unless you have someone who can order it wholesale for you then you might be able to get it below $200. I got my Simonis 860 cloth for a 9 footer for $200 exactly.
Most retailers will charge you quite a bit more than the $214. One retailer tried to charge me $400 for my cloth!