I got the lighting kit from AliExpress, link below:
￡8.89 20%OFF | 10 in 1 RGB LED Atmosphere Car Light Interior Decoration Fiber Strip Light By App Control Decorative Ambient Lamp Dashboard Lamp
Smarter Shopping, Better Living! Aliexpress.com
I got 14 in 1 kit. I have done the doors already. The subcontrollers needed some resistors loading to the circuit in the doors, so did not work straight out of box. But only because power from door modules is restricted for ambient and door handle pin.
The kit comes with thin optic fibre and a skirt guide for the fibre. In door trims there is not enough space to put guide skirt so I used the optic fibre only, even that was hard to push into position but it looks good now.
In dashboard, as in photos above, I have used optic fibre only under the metal trims and used fibre with skirt Above the trims.
I am testing kit for dash board and central console yet, using ambient, cupholder and footwell pins from BCM. The default supply to those pins is very low so I changed the Load Type for those pins to General LED using vagcom. If Light function is set to Ambient 1 for ambient and cupholder pin and Footwell for footwell pin, then they can be powered On/Off from MMI after menu activation and they will turn on if Door open, or parking lights active and turn off when you Lock car.
I can explain further if you do get around fitting it and need any help.