I made a decision to just buy the Ciao markers, they’re less expensive than Sketch and Original with a few less benefits e.g. cannot replace nibs or use with the airbrush, neither of which concern me. 

The colours I brought are below. I had to get a couple of Sketch ones to complete the colour set I wanted.

BV04
BV02
Sketch BG45
B05
B24
BG10
E00
Sketch C-4
C-7
BG49
BG15
B02
Colourless 
E02
E51
E53
G05
G07
G14
R05
R27
R29
RV02
RV06
V04
V06
Y06
Y08
Y15
YG06
YR07
B12
R02