That's an M3 gripframe, don't know if they fit on Spyders (their markers are nearly identical, but alot of the time they put slight differences in the spacing of the screws on their gripframes and stuff like that). If it lines up properly there's no reason why it wouldn't work, all those sear-tripper frames work the same.
Yeah, I'm pretty sure the M3 frame does work on spyders, can't remember if I emailed the guy when I was thinking about importing one and buying a spyder here, or I saw it on their website. It should work. Even if it doesn't I'm sure drilling a few holes in it would make it fit!