You can still get aftermarket parking sensors like these. The very cheapest ones are probably best avoided (although you can cheaply  try them out and see how long they last!)  I think I would go for Marelli or Hella from the linked list.  Make sure they are correct for your car of course.    Autodoc is based in Germany, they usually have very good prices but slowish delivery to the UK.  Not sure how fast delivery is to the Netherlands.

Edited 29 April, 20242 yr by Rheumy
Missing link!

Battery fuse box cover 6R0 915 429 A