Where to get turret terminals?

Hi All,

I am looking for 4 - 5mm dia. turret terminals, the type one frequently finds on transformer outputs. The bottom few mm is serrated to form a press-fit into a sheet of fiber.., and there is a central hole through which the connecting wire goes.

Does anybody know of a seller? Preferably in the Jo-burg/Pretoria area, but they could be posted from anywhere, cost refunded.

Thanks