I just did a quick search through the poser gallery here for "equestrian" and "horse and rider" and I found one image that explains the outfit they used. You may want to try that and do a more intensive search. I find that the galleries are a good place to find items and if the member hasn't mentioned where an item was found or linked to the product here at Renderosity it's always possible to site mail the member and ask.

Good luck.

...... Kendra