Can anyone here patch terrazzo floors?

There are very few who know much about terrazzo these days. When you find one who does, grab him. I'd suggest calling a stone yard, a flooring company that deals in commercial, or look up refinishing materials online and see if you can find a distributor and call to see if anyone has someone they can refer you to. It's not what they do, but perhaps they have a name.

Dwayne Venable of Venable Terrazzo

Patchwork is part of the biz but obviously not their highest priority.

May have to wait until they are in between bigger jobs but I am sure they will take care of you.