I have a 0320 with a "Stratus" vacuum pump that is leaking oil around the shaft between the pump flange and the pump housing. As I understand it there is a seal on the engine where the pump flange mounts up that the coupling passes thru. I figure I will need to replace the seal, gasket maybe the coupling and probably the pump. The pump has 700 hour on it and though it is giving me 6" of vacuum it is close to life exp. The original was airbourne. What, who is Stratus can't find anything on them. Were they bought out and if so is my old pump a core for whom. It calls for a 211CC ?