So..in my last posts I was replacing spark plugs and there is oil coming into the plug wells. So now I need to replace the valve cover gasket set. The shop i took it to says that the rear main seal is what the problem is. So, is there any website or store I can go to to get the parts I need and how hard is this to get done? Or do I just need to suck it up and pay the 400 dollars for them to do it for me? Thanks.