Weather Shield Rescue!
Thanks for posting. I believe we can help. These casement looks like like older versions of the 38-097 and 38-098, which are indeed available in black. Just review the diagrams below to ensure they can fit your window. Note that these locks require an updated keeper, the 38-079, which is sold separately.
As far as the casement window operator, we should be able to help with this as well, but I need to see the entire mechanism, including the link arm(s) that push and pull the window sash closed. A bird's eye view, with either the operator removed from the window or at least with the window open, would be best for this. From there I should be able to determine what you can use as a replacement.
We don't currently sell these locks in black, but after looking into it I've learned that this is, indeed, a finish we can supply.
Please give us a little more time to look into this and we'll let you know as soon as we have an update for you.