Well... as PJ can attest since I''m in the middle of replacing my knock sensors...
here's a couple of parts gone bye-bye right now...
that thin gasket on the upper plenum... is now OFFICIALLY discontinued... save the bare metal and you gonna have to use RTV sealant.
The lower alternator mounting nut is currently on backorder from Japan...
Update: Hey PJ!!! Tim Duncan of the Spurs opened up a Tuning shop not far from where I live, those guys re-tapped that nut and I'm back in business!!!
So find a machine shop to re-tap the nut if you warped it like I did...
Good luck with any engine work.... if you're a noob like me... make sure you got a second car to tool around town in...