You might consider picking up a Pachmayr Synthetic Stock Adapter. It has threaded inserts that match up to the screw holes in the pad, so you aren't limited to the screw hole locations on the factory stock.
It is $5.50 from Brownells, and comes in two sizes based on screw spacing of the pad: 2.87" for Small and 3.12" for Large.
#692-921-287 (Small)
#692-921-312 (Large)
http://www.brownells.com/
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