How to find a missing copy of Casablanca

Bought, at lunch, a replacement DVD of Casablanca because the other one is lost/wedged somewhere...stopped on a whim at the little Discs Before They Falter Shoppe or wherever and shit yes!, there was a copy for less than nine bucks, with tax.  So: yay.  Have looked for the old one off and on for months.

Now, I can be certain that the other one will turn up five minutes after I'm home tonight.

"Huh!  Under a two-liter of Vernors in the fridge...who knew?"