I used bmw e46 projectors (~2.5") with e55 shrouds (3") on my bugeye. I ended up making my own shroud centric rings using the e46 shrouds, bondo and paint. The ring I made using the BMW shroud snapped into the lens housing, bueno. There was no mecanical connection for the shroud centric ring to the e55 shroud, no bueno, so I used a few dabs of JB weld and its help up fine for a few years.
damn, thats a huge image