I bought a drivers side gasket from ecs and it fit perfect. It came as one piece, no trimming needed. Same for my E39.
I replaced my lenses and had condensation in the driver's light. For sure took care of that.
'04 330i ZHP sedan | Mystic blue | Alcantara | 6MT | 111k
'98 740il | Schwartz 2 | Sandbeige | 5AT | 238k | lowered on Bilsteins w/ B&G springs
'00 540i sport | Titanium silver | Black | 5AT | 120k
'85 Mustang GT convertible | Medium charcoal metallic | Gray | 5MT | 215k | one owner, all original