Just be patient and wait for them to get into wrecks and wind up at dismantle yards. Then you can pick them up for a few hundred vs a few thousand from the dealer.
'98 Dinan/RMS stage 2+(VAC cams, CES Cutring etc)
'15 Buick Regal "T"(wife)
'06 Saab 9-5 Combi 5mt (full suspension, LSD, clipped turbo etc)