Hey Buddy - there are a few types of buggy bar out there - Most of them are pretty crap
although the rear one I have on my Manx should work on a bug as it mounts to the frame horns - Try giving Mark Dryden of Flatlands Engineering a call and tell him Lee sent you
As for the front one - I had mine especially made by a friend so it would be the right width and have the correct bends as most "off the shelf" items dont look right, With some small modification i reakon you should be able to mount it on a bug
Have a look at mine at the next show