S & S Models have produced an excellent series of 20mm metal ans resin vehicles for the Rhodesian Bush War and the South African Bush Wars.
I believe these were painted by the talented modeler Ashley Straw and most of the models were designed by the talented Antonio Bras Nunnes.
Look for S & S Models on line.
There is a good selection including the Crocodile, Puma, Selous Scouts Pig, SAS Pig, and the 81mm mortar carrier Scorpion.Not depicted on the website is the Rhodesian SAS Land Rover which I know Antonio has sculpted.
There is also a very good selection of South African Bush War vehicles.