Three weeks and no response from Stillen. No "we screwed up and are sorry." No "customer was an unreasonable ****." Nothing.
PS: I can understand them not wanting to break up kits but not selling parts replaced during normal use and maintenance (o-rings, belts, &c) is ridiculous. Not giving the specs when you don't sell the parts is even worse - what the hell is so secret/proprietary about a freaking o-ring? It's probably a standard part that is available any place they sell o-rings. If not, they need to hire new engineers. /rant