Are the PF and FL different? I had my PF washer pump replaced and I don't remember the garage saying it was much of a job, they certainly didn't charge me much labour. In fact I had that same pump replaced under warranty by an Audi main dealer and they didn't make a fuss either, I certainly don't remember the bumper being removed.
I borrowed this that Adrian previously shared, confirms what Mike said to a degree
__________________
Audi D3 S8 - 2007 - V10. B&O, Phantom Black, black and silver interior, and still completely standard with everything working as it should
Audi TT - 2015 - Ultra