I've got a small leak at the Push-In fitting on my GF822 filter. My first problem is getting the Push-In out of the filter. I'll attach a photo of a GF822 so you see what I'm talking about. The push-in goes into the hole on the right in the photo. I cannot pull it out and I will probably have to resort to using brute force.

When I get it out, where can I get the proper push-in fitting? Apparently in was attached to the fuel hose that runs to the fuel rail on an LS1 (just like a 1999 Corvette with an LS1).
Is there a way to seal these push-ins better?