I don't know where you can find out more, you might try searching the LCML archives.
I vaguely remember reading a thread there many moons ago about the company that manufactured them (Fairey Winches, Ltd. of England?) going out of business but that some other company bought the rights to their designs or something. I'm pretty sure that no one makes them any more.
Here is a picture of one on a 78' FJ55 4spd, so I would think that it would bolt up just the same in a FJ40. I wouldn't say that it bolts up in-between the tranny and transfer case though--more like on the very end of the transfer case.
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