Hi,
Yes, there was a color wheel. Not for the 200, as I recall, but for the 460 Monochrome. Yeah, that had to be a joy to use! Not good for shooting the Indy 500, for sure! A glacier, maybe, but then glaciers are white and so monochrome is fine as-is!

I can't recall exactly which cell those packs used. Not AA, one of the other A-series cells, 2/3-AF comes to mind and is pretty common. I do clearly recall that they used a common one though, so any of the battery places will have the correct cells. You simply measure length and diameter and consult the A-series cell chart for the correct one.
At one time, I was looking hard for a 660M, but then I found this nifty mono conversion plug-in for Photoshop that takes the color image from my 760C and does a good enough job that I no longer look too hard for a 660M. A true mono would be a bit better, but the plug-in lets me play with filtering on the PC, and I like that.
Still, if one is collecting the early stuff, then one really does need a mono model of some sort. Even at 1.5 MP, a mono unit will take a pretty nice image.

Later!
Stan