Yes I did. Actually, the one in the box right now is a blue one. I put it back in the box and use the gray one because it looks better with my R91 on it. Also the 510 started getting loose in the mod, so I took it apart and wrapped a couple turns of Teflon tape around it to tighten it up before I put it back into the box.
I haven't needed any screws for mine yet, but that is a good question. Have you checked hardware stores? Please let us know if you find a good source for screws!