I used to wear those Gap Reverse Fits!

Give the men's Levi 560's a try. They are very similar, but without the tighter ankles the Gaps had.

Mervyn's has the Levi 560's for $26. I pick up a few likely sizes from the mens dept and take 'em to the women's dept to try them on.

Levi 550 have smaller butts, so if 560 don't work or bag too much try the 550.