I don't think there is such a thing available, at least not that I've seen. I've done several. Just like you, I was a little nervous the first time or two, but they've all worked out great. Just take your time. Lay the cover over the bridge, snug it up from the back and evenly space the sides. Then do a visual just to make sure everything appears to be lined up correctly and the cover is sitting comfortably. Then mark the center of each hole. Pick-guard screws are what should be used. Make sure you do your pilot hole about a half or 3/4 the size of the pick-guard screw so you'll get a tight fit, and don't go too deep either. You should do fine. Just keep the cover properly aligned. I've used painters tape sometimes to keep it from moving once I've gotten it just right. IMO, the results are worth it. Covers just add soo much to the eye appeal.
