Ultrafire WF-606A Tailcap Switch Broken. Repair possible?

Hello. I've got an Ultrafire WF-606A that's worked faithfully for many years now. Until now. It has quit switching on and off. With a wire touched from the end battery to the side of the case, the light works, so I've deduced that the tailcap switch is the culprit. My guess is: the switching mechanism inside the tailcap, has failed in some way. What I'd like to do is remove the actual switch from the tailcap barrel and see if I can fix it, but darn if I can't figure out how to get the thing out of there. Any ideas? Is it even possible to repair the tailcap switch once I do get it out? And if not, does anyone out there have any idea where I can purchase a new tailcap for my particular flashlight? Appreciate any help you can give me.

-Bert

Check this for pictures of how to remove the switch.
Link