PI intakes are on ebay, Livernois motorsports, Sean Hyland motorsports, I have not seen a spacer? Are you talking about gaskets or an intake spacer? I don't think the spacers do much for hp
I've read of people using non-pi gaskets for the PI intake, or you can just use some RTV sealant. I think there was either an issue with the PI gaskets or they're just really expensive. I think livernois' price is a little steep for the kit as well. Might want to check Parkway Performance as well. They also sell PI kits on Ebay.
~A.C.
I'm looking too. I think instead of the adapters (too expensive) or just RTVing the intake (don't trust it) I'm just opting for the headswap. I have a cracked intake so I'm really in a big rush to get it fixed. For the money you'd be better off just doing a complete swap.