Have a look at the New Zealand and Canadian offical Histories, I believe both can be found on the net.ORIGINAL: Prince of Eckmühl
I think that about the best maps that you can find for the Sicilian Campaign are those in the associated Green Book. I've pored over many a volume looking for decent contour maps for Operation Avalanche. I ended-up using Google, instead!
Next step would be finding hard copies of the British and Indian histories.
