Yeah that file is that he is looking for. If you can attach it somehow...
OK start from the basics.
Check this link:
https://audi.7zap.com/en/rdw/audi+a3+s3+sportb+lim+qu/a3/2009-646/9/919-919020/#1
So item 1 is the module.
PR-7X5 is for PLA+PDC. So you need :
module 8P0919475 J or E for 1.0. or
8P0919475 P for 1.5. I don't remember if K is also 1.5.
I would advice you not to buy any other module. Only one of those shown for this car.
Regarding the looms. Have you bought them yet? If yes, lay them on the ground, and take some pictures. We will help you identify each connector.
In short description, the module has 3 ports.
Port 1. all the rear sensors.
Port 2. all the front sensors and the front buzzer.
Port 3. power and earth, dashboard buttons, rear buzzer, and gateway connection.