I have some bats too that I would love to ID. There were a few of these very small bats roosting in roof cracks on Dunedin Farm, about 60km north of Beaufort West in the Karoo. They were jammed in with some Egyptian Freetail bats.
I think it is either Myotis tricolor or Cistugo lesueuri and looks more like the latter from the few pictures I can find. Thanks Jon