Here's the problem: PerlDesk satisfied your requirements, but my (good) experience with Bugzilla^* leads me to suspect that our requirements may not have substantial overlap. But maybe my requirments aren't your group's requirements.

Start here: Gather up a list of what's required in an issue/bug tracking tool. Get your boss's input on this since s/he's a major stakeholder. Then compare how Bugzilla, your tracker, and other alternative (like RT) satisfy those requirements.

Given the options available, I'm suspicious of the need for new home-brew systems.

* I was using BugZilla mostly as a management tracking tool, to give me oversight on where we stood, so I was leaning most hard on searching and reporting. I've heard good things about RT, too, though I haven't played with it yet.