I used the same place in 2013, the result was good but it wasn't a simple journey! It was their first S4 cab, so shipped the lights to them in the Netherlands, a few weeks later they arrived back, with faults
I could have shipped them back, but in the end I disassembled and resolved myself - screws were not tight and the polarity of one of the shutters was backwards.
If I was doing it again (and I maybe soon) I'd probably go to EM Tuning
https://emtuning.co.uk/
See
https://www.youtube.com/watch?v=7DbrJY6yvYc as an example