Nepal - Poverty level is at 24.8%, which causes two things - Children could sell themselves for money, to support family members, or themselves. Although, this could decrease the quality. Lower quality - lower pricing. Clone could achieve quite a few children.
The population for children ages 0 to 14 is 34.7% of the total population, so that further increases the children amount, or rather, chance.
If your looking for child slavery service, the kidnapping rate is 1.0 per the 100,000 population, Which does increase the factor a bit.
Overall - Low pricing, if clone has enough money, he can afford quite a few, low quality however. Decent children slavery, and amount of younger children.
Hong Kong - 11.7% of the population is children, less then Nepal, but still a decent amount.
Not a very large kidnapping rate, here. Spiked between 2006 - 2008, but not that much now.
Less luck here.
Just China Overall - 18% of the population is children. Good amount. 11.8% poverty level. However, China likes to spend big bucks on Military and enforcement stuff, so be careful.
Nepal seems to be your best bet, and good luck.
