Just use RTV silicone; it will work just fine until you get the actual gasket. Don't gob the stuff on, use your finger to spread an even 1-2mm thick layer of it on. Make sure the surface is absolutely clean; use a razor blade to scrape any gasket remnants off, then use some isopropyl alcohol to wipe the area down- this will remove any potential petroleum products, which would cause premature failure. The oil residue that is present in your intake because of the nature of our PCV system will eventually cause the RTV to fail; this is why I reccomend it only as a band-aid solution until you can purchase the actual gaskets you require.
As far as where to get the gasket? Check out
www.RockAuto.com - same stock as napa/autozone, at much cheaper prices; return customer discounts, and a variety of shipping/payment options. Fel-pro gasket: $1.55+$6.19 shipping=$7.74 shipped to your door, in 3 business days via UPS
-EngineBuilder