Okay, so having done a pretty comprehensive search now and having found over 100 photos of many women, there still seem to be several who were very elusive. Here's a set of lovely ladies of whom I've only seen 3 or 4 images max- in many cases the image below is the only one I have of them. If you have more, please share!
The first is from Bristol- that's the only in-ride shot I have of her, and it's possible she rode clothed; the next two Brighton (both have ridden before, but bizarrely these are the only images I have of them this year), and the rest London.
Likewise, this gorgeous busty chick in white pants- I've seen, like, four of her to date.
https://forum.oneclickchicks.com/atta...8&d=1467828012
Credit as always to original photographers & original posters, where relevent.