True Nopal is currently sold in the US, UK, Ireland, New Zealand and Guam in over 9,000 grocery and healthfoodstores including Sprouts, Whole Foods, Albertson's, Safeway, Kroger, Fry's, Waitrose (UK), Tesco (UK) and many other retailers.
A healthfoodstore employee told me I shouldn't grind them in a (cheap) coffee grinder because of the heat of the grinding process, so i guess this isn't true?