oil in meh plenium

ive cleaned my plenum once before and now its dirty again , really oily , i have oil coming in through the air filter hose , i know why , its cause of that damn vacuum hose that runs from the valve cover to the intake hose , is their anyway i could just pull the hose and stick a damn filtered breather off ebay in it , cause it is making quite a mess , i actually dont have alot of knowledge on the subject for some reason , please help
 
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