Here I have a rear bumper new as per the VW Specialist Travlin-Lite. It is a T6 or T6.1 for tailgate model. (It will not fit Barn Door!). Due to size collection only.

It does not have cut outs for parking sensors.

As new these are £240.

For reference this is the exact version

https://travelinlite-transporters.co.uk/products/t6-tailagte-rear-bumper-primed-premium-quality-transporter-15-onwards?_pos=19&_sid=3feb8d1d2&_ss=r