how to remove broken water pump from '91 318?

[shplat]

My beloved Otto, has a problem with his water pump.
Apparently it's dead, and needs to be removed.
I'm new to this area (Connecticut) and couldnt find a good mechanic quickly, so a friend tried his hand at it.

Problem now is that the mounting screws are broken off, and the pump is still there. A winch was attempted, but it's stuck.
HELP! Suggestions will be gratefully accepted.

Thanks to all in advance,
Shplat