You might want to try a crowd called 'Hunting'. They had an operation in Zimbabwe flying tourists around the Victoria Falls using Barons, C 210s and the like. As far as Indonesia and Malaysia etc go, forget pistons. Avgas is very hatd to acquire regularly so everyone uses turbines.
Perhaps trying Indonesia Air Transport at Halim Airport Jakarta might be useful.
A friend of mine worked for Hunting about 10 years ago and it got him started, he now is a Captain on B 777 for Emirates. Hunting were a British based company.
I.A.T. operate lots of small turbine types including Shorts 330s up to Falcon 20 jets. They offered me a job about 9 years ago now but I had a better job already. For a new guy though it would be a good start.
No. I won't send you names of contacts as (a) they are now good friends, and (b) the names and addresses of the rest are so old as to be wrong.
Anyway a bit of detective work on your part will help prove to them how keen you are.
Good Luck. Flying is a great life.
Cheers