Paddle shift retro fit?

[RPE11Y]

I have got me an sl500 sl65 black replica - lovely looking and sounds awesome but would like to consider retro fitting paddle shifters to update the driving experience.
Can anyone recommend a specialist to carry this out - would prefer Central Scotland but would travel for the right expertise...

[RPE11Y]

Only got this one at the mo - bought it in Staffs...

[RPE11Y]

I’m prepared to buy a new wheel but would really like a specialist to carry out the job as I fear I would be out my depth...