Lefty Edges do popup over on evilbay from time to time. If you really prefer and Edge, one thing you can do for the time being until you find that lefty Edge is take a righty Edge (preferrably one that's already lost most of it's finish - I'd hate to see a nice one get ruined) and drill a hole thru where the bar would go on the left hand side. I lifted the pic below from an auction, but you can see on the right side underneath the baseplate that the spot where the lefty bar would go is already marked out, you just have to drill thru the top part of the plate.
http://smg.photobucket.com/albums/v6...ent=Edge_3.jpg
You'll have a hole on the low E side, but you can cover taht with electrical tape or whatever for the time being. You can usually find worn Edge bridges pretty cheap on evilbay, too. Again, not necessarily the BEST solution, but a way to have an Edge on there until you can get a real lefty one.