We can get 245 units in Australia from SparkFun. If you order today, we can dispatch this stock between Mar 07, 2021 - Mar 09, 2021.
This is a black insulated binding post. These binding posts do accept banana plugs, and are a great way to connect single-wire leads. The colored cap screws up and down, and is designed to clamp on the connecting wire.
These binding posts are sold individually. We also carry a similar red binding post.