Over Her Dead Body - messenger bag

I just watched Over Her Dead Body (mega funny, but plotless) and discovered a bag on it that I want, but can't find. The character played by Lindsay Sloan (friend from Sabrina: The Teenage Witch... remember her?) was using a leather messenger bag with an adjustable strap... adjustable with a buckle. It was cute, not huge... and apparently disappearing... I can't find it anywhere!! Or anything like it! So, if you know about it, please let me know asap. Thanx!