UPDATE
Added a Hogue grip, it feels absolutely fantastic, looks great and really helps you handle the gun. It was relatively easy to fit, I used a dremel and shaved off the inside little by little till I achieved a snug fit. I suppose you could cut a bit off the weight under the grip to make more room, but I like the weight.
The grip itself won't fit unless you re-cut all the interior lines, they are off just a fraction, and the screw holes are not quite big enough for the studs on the gun body. Heres the finished product.
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