madstaff, have a look at this link;
https://www.vwpress.co.uk/en-gb/models/variant-golf-gti-mk-viiTo the right, under documents, 5th one down is a link to a CS Ed40 brochure Pdf.
Very, basically, from my own experience, you tend to find 3 kinds of CS.
1; base car, bought on a lease with few options.
2; Fully optioned 5 door, dsg, pan roof, with heated leather interior, uopgraded nav, dynaudio.......... A top of the range GTi, rather than a car in the spirit of a clubsport?
3; As close as you could spec to a CS-S, if you needed 4 seats.... Options such as Recaro bucket seats, manual, Dynamic chassis control, 19" wheels.
There are more basic or close to basic spec cars around as they were at a similar price point to the Golf R, which was sometimes even cheaper on a lease deal.
If you are looking for specific, desirable, options in a good low miles car, you may be waiting a while or just get lucky...?