There are quite a few bumper build threads on Pirate 4x4. I used to have a bunch of pictures saved of them, but I purged them all when I sold my Gen II.
There is enough room for a close mounted winch if you're willing to give up your factory bumper. If you want to keep it... It'll stick out, a LOT.
also, you might look at the Warn Transformer Brush guard / winch mount.