Use only OEM new from Joe!
http://www.infitipartsusa.com
Occasionally there are some on eBAy, but be very careful to establish they are OEM new and not Python or some other 3rd party caca.
Check the under plenum hose posts in IOM. If it is anything other than 2, 7 & 8 (I thnk?), plenum has to come off.
At 190K, I bet plugs, VC gaskets, KS and harness and all hoses are due for replacement.
Welcome to NICO.