I got some cheap halo fogs off ebay for my retro. Oddly enough, they had glass lenses. I switched back to my old fog setup because it just had way more overall useful-while- driving output. I'll see if I still have the lenses, though, if you want them.
Follow-up to my retro, real quick, while we're talking about it: I was not impressed with the P1's. I tried to be, but they had uneven cutoff, indistinct cutoff, a narrow beam with little throw considering I had 55w bulbs in them, and after about six months they had literally separated at the seal. There was a screw holding them together, but the seal itself was basically gone. Not sure if the heat from the HID's cooked it or what, but when I took the screw out the halves of the projector just fell off of each other. Normally you have to pry and scrape the seal off to get them apart. My personal grade on them is an F.
DEPO brand OEM replacement fog lights are decent quality. Plastic lenses, though. I got a small scorch (not noticeable unless you were down looking for it) right in the center of the lenses from the HID's being closer to the lens than the standard 880 bulbs.