Hi - great site, great forum! This is my first visit and post but I can shed a little light on this topic. They are from a custom shoot from FeetHeat, cost was $140 for 70 shots and to anticipate the next question - no, I don't have copies any more - I got rid of them when I was feeling guilty and "purged" my stash (D'oh!).
The model's names are Monique (in the jeans) and Brittany and they did a pretty good job of following my script. The company does not do bondage well (as you can see) but most of the girls are very good looking and are fine posers, very flexible feet.
For what it's worth, the script was just an old classic "I'll teach you to flirt with my boyfriend!". If interested, I can supply some additional details.