Something like this hooked up to both PCV valves would be your best bet. It will let the extra air out of the crankcase, and it will let any extra oil be collected in the tank which you can drain whenever you need too and its cheap.
http://store.summitracing.com/partde...5&autoview=sku
However as Im sure you most likely know a working PCV system helps seal the rings with the vacuum from the motor. So you might want to look into why your getting oil tossed up onto the breather.