I have found that through out Thailand, Malaysia, Singapore and Cambodia the gas for the camping stoves that use the EN417 standard threaded connection and use a lindal style valve are availble, but you have to resupply in the main towns or cities. most of the big shopping malls in Thailand and Malaysia and Singapore have adventure stores that stock outdoor supplies. last year in Phuket I bought a Chinese folding Epigas look alike style stove for about £7, and a very good bit of Kit it is, the same shop was selling a look alike of the Top range primus multi fuel stove for £40 a saving of about £110. My thoughts for travelling through Asia are use multi fuel stoves as unlike here fuel in small qualities are readily available.