Hyundai: 2000 Elantra Window Regulators?

A few months ago my passenger rear window regulator decided to eat the
cable that pulls the window up and down, now my passenger front has
decided to do the same!

Last time this happened, I was able to find a used one on ebay for $50,
these parts are $250 at the dealer! This time I'm having a much harder
time finding one.

Does anyone know of somewhere they can point me for a used/refurb/cheap
window regulator for the passenger side?