Indonesia has been buying Chinese C802A anti-ship missiles. The C802A is a 6.8m (21 foot) long, 360mm, 682kg (1,500 pound) missile, with a 165kg (360 pound) warhead. The C802 has a max range of 120 kilometers, and moves along at about 250 meters a second. The French Exocet missile is the same size and performance, but costs twice as much (over a million dollars each, but the manufacturer is known to be flexible on pricing.) The Indonesians see the Chinese missiles as a much better deal, especially since Indonesia is not looking to start a war anytime soon. So why pay premium prices for a premium, battle proven, Exocet.
Thailand also went with the C802 when it recently refurbished its 053H class frigates (bought from China in the 1990s), and added the C802 anti-ship missiles to replace the older, and bulkier, SY-1s.
The Exocet has been around for over three decades, has been proven in combat and is known to be reliable. The C802 is known to be less capable than the Exocet, but it looks similar. For a navy that never expects to get into a serious war, that, and a much lower price, is enough to get the sale.