In terms of "central repository of A10 specific images", that might be useful, but there's already a wide range of community sites collating information on Linux on A10, without trying to extract cash for it..

The tablets they show are almost certainly LY-F1 - it's sold under dozens of brand names and in a few different configurations and a few different cases, but the specs match perfectly and at least one of the pics are of the case that's most commonly used with the A10 version of the LY-F1.

But most all of the A10 based boards are practically identical - I'm assuming most are variations over some prototype provided by Allwinner given how similar they are.