I have a couple but the holes are enlarged from use just like the PCV dual connector or Injector housing connectors. Put me down for three when you have the new ones in hand
The two ports are connectors from Drivers side PCV and Drivers side Charcoal Canister (1990). On the 1991 the charcoal canister being behind the passenger side rear wheel has the connector drawing Plenum Vacuum angled back under the Plenum. So on 1991 there is only one nipple on the Plenum for PCV only behind the Throttle Body.