Where can i buy VC gasket, intake manifold ( Plentum ) gasket, and the throttle body gasket...????

 

Just buy them from the stealership. They are really not that expensive. I bought the Plenum and Valve Cover Gaskets and it cost like 40 or 50 bucks. The gaskets should last around 100,000 miles atleast. I just replaced mine at 175,000 miles.