It's not really true to say that National Archives AIR40/45 contains "a month by month crash location for every German a/c in France, Belgium, Holland and later on Germany."
What it contains is a series of reports from RAF (and later Allied) Air Technical Intelligence Teams on enemy aircraft that were shot down, crashed, were abandoned or captured on territory held or overrun by Allied forces.
You will look in vain for much from Holland because a big area of the country remained in German hands until the last and there is nothing much from anywhere but Northern Germany either. Also they seem to have lost interest in cataloguing wrecked aircraft quite soon after the war ended.
There are however masses of wrecks on British soil, in Normandy and casualties of the Ardennes/Bodenplatte operations. More details on some of these aircraft can be found scattered throughout other 2 TAF files. For Africa, Sicily and Italy you need to go to the AIR23, AIR24 & AIR51 series.
The website of the Luftwaffe Archives Group (
www.lwag.org) has more about this topic.