I did it, don't have pics, but 02 sedan to an 02 aftermarket coupe bumper cover and wired up DEPO fogs. Got a CF oem-style coupe hood for little more than 300 and fenders to bumper to hood line up well. It's tough maybe fitting the bumper to the fender but it was that way for when I had to put a new sedan bumper as well. Got non-metal washers, bolts and nuts from home depot and had my body guy use them after he painted my coupe bumper.
(Also aftermarket seems to be ok for me, I'm on my third replacement bumper now, have had bad luck in that department with snow sliding, raccoons, etc.)
Another question which can tie in to this but is probably a yes, anyone do the conversion and add a lip to it? I'm looking at a WW or probably Mugen (cheaper and I still like the look) polyurethane lip. The bumper needs to come off for when I install my ordered retrofitted OEM headlamps and figure I'll have it done then.