Radio replacement - Back to original spec

[Chefchenko]

Hello hello,

I have checked out the vehicles VIN online and have a spec sheet that is confusing me. It states the following in regards to the stereo:

BMWDECODER.COM
S650A CD player
S661A Radio BMW Business (C43)

The bit that I am struggling with, is everywhere online where I see a pic of a CSL with a CD player, it also has the automatic AC unit below.

What I am dealing with is an aftermarket head unit, along with the dial controlled AC unit I can only find evidence of coming with a CSL spec'd with no stereo at all and a carbon fibre plate.

Any guidance mutely appreciated.... and clues on model numbers of parts to order.

Chef