F*C, if it must come out you may as well get aggressive with it. I'd soak it with some Kroil, or 50/50 tranny fluid/diesel mix, then get a BIG pair of channel locks that you can get the grip you need on it and twist.
There are replacements available....JCarter or maybe its The Filling Station. I know I've seen them listed somewhere.
...and oh, just before you start twisting hit you thumb with a hammer to get you in the mood!
Let us know how it goes.