Need Help with Finding an Extender for Fill Port

This has probably been asked a million times, but I need to extend the male fill port fitting on my airgun. When using the female quick disconnect from the fill hose to the male fill port, the connector is often difficult to grasp in order to release it after a fill. After many searches online I cannot find what I assume is a simple male to female QD connector. Can anyone tell me the name of what I'm looking for and where to buy one? Many thanks in advance.