I heard back from a friend in Indonesia that used to be a fish trader & had plenty of experience in clown loaches collected in both West Kalimantan, as well as Sumatra. Here's what he had to say on the subject of commercial breeding of clown loaches in Indonesia.
Ive been off from fish industries for sometime. I am fine and hopefully you are fine too. There are some breeders which actually can produce clown loach through induced breeding. However, currently the portion is very small considering high cost of producing n raising the cl to the saleable size. Usually this is done in off season for cl in their natural habitat. At this season due to rarity of cl, its price will increase that can cover cost of production through induced breeding. But for large trader they will collect cl during its season n set aside some to be sold during off season.