Source for vacuum line couplers, Y's, etc
 

I've got a slow vacuum leak that shows up on hills. I want to replace the rubber couplings and Y's on the engine's HVAC lines. I can't find the parts at a fair price anywhere. I'm not paying Ford $4.50 for an 1/8" coupling! I'm talking about the rubber female Y's, not the plastic male part. Yeah I know I could add rubber legs to a plastic Y but I didn't want it to look like it was done in Louisiana.
Do you know of a source?
Also looking for a good quality vacuum check valve. Those Dorman's don't last much more than a year or two.