For anyone who got too frustrated, and just asked the parts store to look at each piston, sorry that this was too late.
This should probably go on the wiki page.
Ask me for the xl file with the data.
Not totally finished yet, but what i have done is confirmed correct. Sources:
japan-parts.eu (some incorrect data verified by other sources)
Precision intl (pictures)
Alibaba (good source of cheap Chinese exporters with product photos)
ebay (people selling new products in boxes with part numbers)
JCC Pistons (Dimensions) http://www.jcc-tw.com/en/