hey guys just wondering, i think my injector o rings are leaking. there are the o rings that go into the fuel rail, and the o rings that go into the head correct? i need to replace the ones that go in the head. is it safe to get these from like an autoparts store, or would you recommend toyota(they are not in stock). anyone have a diagram of how the injectors fit into the rail and head? in the tsrm, it doesnt show an o ring for the head, just those gormmets. any help would be appreciated-thanks!