Throttle Cable

I was driving today and my throttle cable on my 95 grand prix 3.1L broke. I was driving uphill and then felt my gas pedal drop to the floor and not accelerating at all. I was lucky enough to make it into a parking lot.
I was wondering if this happened to anyone else? Checked around at a bunch of stores like autozone, pep boys, and napa and none of them have any.

Anyone got any ideas where to go? I am gunna try the dealer tomorrow.
Thanks!