Huge Ai Uehara fan here, but haven't seen them all. I ran Ai Uehara and "slut." The list is extensive.
www.javlibrary.com
You might want to check that out and see if you can find it. Then report back here.
Also, if you can't find it that way, try to remember what she is wearing in it. Easy to pick it up from the box cover that way.