For my RR 2010 Supercharged I need a Automatic Parking Hand Brake Module Actuator For Range Rover with cables. Can anyone recommend a seller and do you have any experience with replacing it?

There are plenty on ebay or Amazon. How reliable are those sellers?
https://www.amazon.co.uk/Handbrake-LR01922...B0C6B2FNN2

There is a very recent you tube video of the unit being removed, Rear subframe has to be dropped a bit. On inspection the motor had died, turned out the brushes had worn out/ snapped off. The motor is a very common type, you can buy the end panel with brushes for very little, the motor is not very much.
The following link will give you an idea of the part, it may or may not be the correct one.
https://www.aliexpress.com/item/1005007067...ry_from%3A 2007 TDV8 VSE
2003 TD6 gone.
2002 P38a gone
1999 P38a gone
1997 p38a gone
1993 VSE gone
1992 VSE gone
1966 Series 2a with V8 conversion gone