OK, my suggestion is if you guys is planning for another trip, why don't you make it to Singapore??!! You saw Lai and Tony's farm already, but you do not know what Singapore have, right?? Anyway, I only know only one guppy farm selling their fishes, Guppy Center... other is hobbyist with tremendous set up, but don't know are they willing to let go what they have...
And also price might not as cheap as Lai and Tony's fishes lah...