Do you have any health food stores near you like the Vitamin Shop or Whole Foods? Even little "Mom and Pop" health food stores should have it. I can't think of the one that I buy, but it comes in a clear bottle with blue and white writing. I think it is called Home Health or something like that. If the "search" feature is working you should be able to pull up the names of different brands. I think someone even posted a site where you can order a Jamaican brand. It might also be listed as "Palma Christi" oil on different sites and bottles. That is another name for Castor oil.
HTH