Retrofit APS 8P

Hello guys! I’ve read somewhere in the forum that some have retrofitted the original parking aid of the 8P. Unfortunately, I can’t find the posts anymore. Since I got someone in the back last week and I’m getting a new bumper now, I’m considering whether I can retrofit the APS as well. I could then order the version of the bumper with the holes. Unfortunately, my Audi dealer couldn’t tell me if a retrofit is possible. On the Audi pages, however, I have an accessory. atz (Link) found for the parking aid. However, I have the feeling that the sensors are not as nicely inserted into the bumper as in the version ex factory. Does anyone have an info here in the forum or even the corresponding part numbers that are needed for retrofitting, so that the optics is like ex factory? I would like to provide my Audi workshop with a few facts. First of all thank you! pepsmier