I'm not really clear on what you're looking for. I gather you've got a 1999 Universe UV777P. Does it not have the original bridge installed? Or is the existing bridge damaged? Or are you just looking for an upgrade.
The original Lo-Pro Edge 7 is still in production, if that is what you are looking for. You can buy it from Ibanez parts. I'm not aware of any other trem that would be a drop-in replacement.