GT40supercharged.com
from Jason's site, you will have to go over there to find the image
I contemplated cutting the LHD up and putting the RHD gauge area in it, but before I did I visited Roaring Forties, they were as helpful as ever and I purchased one of theirs and its very similar to the RCR LHD one, very happy. You can see them all below.
The photo makes them look different in size but they are quite close.
RCR LHD, total width 1,452mm with the steering CL 236mm from the CL of the dash.
RCR RHD, total width 1,475mm with the steering CL 228mm from the CL of the dash.
RF RHD, total width 1,460mm with the steering CL 215mm from the CL of the dash.
Needless to say the RF dash will be fitted. It may need some work at the steering wheel exit but that's OK.
I cant remember what I settled on for my build. It would have been measured in inches and either a whole number or a common fraction.