Vac line check valve
 

The hardware stores don't have them. The auto parts store refers me to a company called Grainger. Grainger refers me to the auto parts store. So, without looking to see where to order such a part from the net, can anyone point me to a store, or type of store, where I may acquire such a part.

What do you need it for? Lots of cars used them. Shouldn't be hard to find.

they allow vacuum to be stored in the vacuum ball behind your bumper for cruise/ac vents and the such

ive seen the in the help sections at auto parts store or hit the local u pull yard...

I had struck out everywhere else so I wanted so more input before venturing out. But I suppose tomorrow I'll go poke around the yards and see if I cant get a couple valves and vac lines/fittings tomorrow..
Also, for reference, it's the vac line that runs to ball on pass side of bumper and seems to operate the air flow control lines. It's such a pita to get far enough into dash to really trace vac lines for where the leak is. I believe the issue lies in the check valve that was located directly off of the manifold end: when I pulled it out of the lines I could blow air back and forth thru it, whereas the check valve at the firewall T connector was working properly and only allowing airflow in one direction.

go to autozone in the "help" section, they have them there.