i dont know if you have a pet supermart around you but i thats were i got my 12" silver arowana from and the guy told me he could order me a smaller one if i wanted. like i said i dont know if theres a store around you but i hope this helps
There are a few good fish stores not far from Lakewood that have small Aros for sale. (I'm from Norwalk). You could try Tom's Tropical in Long Beach, 405 Tropical in Westminster or Fins and Feathers in Norwalk. I've seen small aros at all these stores recently but call them first to make sure. I remember 405 had 4-6" ones for about $15 a few weeks ago. The baby ones @2" were just $7.