I say leave the importation to the experts doing it already, they have done the homework and learned what to do and not to do to help the cham's acclimate.
I would talk with Jim @ Chameleon Co. Just go thru him to get some wc's. I think he told me he only gets the popular locales since they are easier to sale. However if your looking to go big, then he is the man to help you get the stock you need I think.
But wc are not as ez to maintain as cb, they are loaded in parasites and need to be treated and thats costly for each one, then the parasite med's make them infertile for 6 months so thats down time your just feeding them and unable to breed them. Then there is the mortality increase of failed adjustment to captivity.