Where are you in the world? I buy mine and all of my tortoise products from a locally owned small mom and pop shop organic food store. They also special order in dandelion for me. Ask around! You'd be surprised what people will order if they know there is a demand!
Take a look at our "for sale" section. Coastal has an ad right now selling Mazuri tortoise chow, and a post or two down from the first one he talks about the cactus pads. He's a sponsor and gives good service.
Yes, that is weird however, I kept thinking I should find them in a store but wasn't sure where but you gave me some great ideas! TY I am going to have to check a few I just thought of.
http://www.carolinapetsupply.com also has spineless opuntia. I don't know how competitive their prices are with other online places. Also, if you decide to plant them, I had a 100% success rate with their pads.
ty all again. Still searching. My problem is living in NW Ohio they just aren't very available at our local markets even the Mexican markets so getting a bit flustered.