Note that this is subject to change and when it doubt check the maps for individual regions. This is especially the case for Stirk where the claim grid has been adjusted somewhat.
Click the preview for the full resolution version (warning-it's over 3 MB in size and very high resolution):
This contains a particular improvement over the original map as claims are now sorted into both their cell numbers as well as actual "claim numbers". For instance if I wanted to claim that little island to the south west of Sutch, I'd ask for Claim M5, which contains exterior cells x: -127 to -125 and y: -44 to -46. I'd only have to give the "claim designation" itself rather than specifying which cells it covers.
Right now I have region claim maps for Stirk and the Gold Coast, I'll make maps for the other regions as well need them or are about to need them.