When I lived in Hawaii in Honolulu I was always told to go to the Pali lookout to search for Jacksons. I ended up buying mine from someone who advertised in the newspaper that they had them available. As far as I know Jacksons are the only available chameleon you can have there. I hope this helped some and good luck on the search for one.
"They are invasive and illegal in Hawaii. It is against the law to import, breed, keep as pets, sell, release, or export veiled chameleons. Penalties can include a fine of up to $200,000 and a possible prison sentence."... http://pbin.nbii.org/reportapest/pestlist/chacal.htm