Angkasa reports that Indonesia is interested in buying the SIDAM 25, a self-propelled anti-aircraft gun developed by Italy using the M113 chassis.
www.esercito.difesa.it [CC BY 2.5, CC BY 2.5 or CC BY 2.5], via Wikimedia Commons
The SIDAM 25 was developed in the 1980s and has four 25 mm Oerlikon KBA cannons.