I'm planning to bring it all together in a more coherent shape some time.
As a first step I've brought together here all the links showing where you can find them.....
If you know of other 'unofficial' collections feel free to add them via the comments facility.
The mitchmen Yahoo! group gallery
I have a tiny presence at DeviantArt - just 3 images at present
and if it doesn't I will resurrect it at another host so keep looking!