I've had to modify one of those stocks to match up with a VSR-10, it's not too hard to do. What you're looking at is ~45mins of work with a mill, no more. Perhaps less, since there isn't much to do to make it mate up with a Tanaka/KJW platform.
If you can't find anyone to do it, send me a PM.
If you can't find anyone to do it, send me a PM.