I found and bought a cheap set off amazon for less than $200. They look like the OEM but the metal siding has a weird look to them now, as if it’s faded in certain areas. It cost about $300 to get them and the roof rack installed so probably about $150 but the installer said it was kind of a pain and he wasn’t sure if the side steps weren’t designed exactly to factory specs or if my 6 years old RRS is just slightly off over time. So my advice would be to get the OEM as most of RR OEM stuff is obviously higher quality.
The installer didn’t have to drill any holes, just removed a number of panels to mount the side steps. I watched a few videos and some guys had to cut into the wheel well covers which I wasn’t interested in doing.
I can't say for sure if these specific ones are, but the ones I purchased from the same seller for the same price are 100%. They came in the original box with the LR model number and stamps. I do recall the pics being sightly different than these.