In case anyone is wondering, it was me who bought one of these lips already.
I did have a replica Aeroware fibreglass front lip (from Shine Auto Project) on my car for about 3 years, but I cracked it badly last month. Coincidentally, these polyurethane lips came up for sale just at the right time, so I decided to try one. I don't know who makes them, but these polyurethane lips are also Aeroware replicas.
The shape is almost identical to my Shine Auto Project fibreglass lip, with the only difference being that the underside is square instead of rounded (maybe for structural reasons). The overall dimensions are the same, so the difference isn't noticeable when viewed from above at normal eye level. In fact, I didn't even spot the difference in the photos.
I did a trial-fitment of the polyurethane lip last week and it was good with no modifications required. Even if the lip was a bit warped (which mine wasn't), I still could have fixed it by applying some heat to it.
The mounting holes are already there in the lip, so you don't have to drill them yourself.
The lip comes with a set of new bolts, nuts and washers for all of the mounting holes.
Although the material is quite different to an OEM bumper, the lip is still extremely flexible, as advertised.
Mine is currently being painted and I hope to get it back tomorrow.
I'll post some photos after I fit the painted lip to my car, hopefully this weekend.
I hope this feedback is helpful!