2005 impala 3.4 code P0507 for IAC or posible vaccum leak

[HUSTLEMANLV]

replaced LIM gasket set on my car, stopped oil and coolant leaks , but now have intermittent check engine light with code P0507 . I replaced my IAC and cleaned out the port it is installed and the throttle body. I was wonder ing if anybody knows of any place short of the dealer to get the PCV to throttle body to Valve cover vacuum hose ? every thing looks good and i tried spraying carb cleaner on the intake but the idle didnt change. lastly i have a base impala so no Tach on the dash. any help would be great