Everyone Wants to Be Her ...
Halloween shops all over the country are being flooded with requests for Casey Anthony costumes this year -- the only problem is ... they don't have them!
TMZ spoke with the owner of Rubie’s, one of the largest international manufacturers of Halloween costumes, they've received calls from over 100 different stores looking for C.A. costumes.
The owner tells us ... even though there is a crazy high demand ... he has no interest in even attempting to seek out the necessary license to manufacture a Casey clone.
So if you want a Casey Anthony costume this year ... you're probably going to have to make it yourself.