Most of the other model horse brands that have rider figures available at 1:18 scale (Schleich, Bullyland, Safari, Papo) only sell figurines fixed in a riding or standing position. Schleich has a few figures that bend at the shoulders and hips, and a few that also bend at the knees. They tend to be in expensive sets, and many have very cartoonish appearances.
Where were these in 2007? Good question. I was full-blown into horses 2007-2008, and I never saw them anywhere. We had both a local gift shop (itself also a big Breyer dealer) and Cracker Barrel selling Schylling items, but they both never sold them. I know I would've bought them when I saw them. I suspect it may explain why they are so rare today, and command stupid prices on the secondary market (an incomplete barrel racing set sold for over $100 recently). I can find little information on them--in fact, what I have came from a packaged example. Their website for the line is archived but was so dependent on Flash and images that weren't archived, it's useless.
So I tried searching for them to see if these were one of those "hidden auctions" and they were. You could only find them if you used the same exact words that the seller had used to describe them. 
