Is there an aftermarket evap purge valve I can get at a local parts store (Napa, Checker, etc)? They have the Bosh ones at autopartswarehouse.com for $70, but I didn't want to wait for shipping. The local parts store don't carry the Bosh valve, but I know sometimes you can cross-reference numbers and get an aftermarket one that might fit several makes and models. Any info appreciated. Thanks!