At the local Sprouts on sale. Nice individual packed and frozen, so I don't have to unpack 3 at a time and vac seal them individually. (Like from Costco). Also, gave me a chance to pick out size of 3-3.5 lbs. preferred. Decided not to take any pics but they are better trimmed also.
There is also sale on Smithfield ribs at Walmart stores. Will check that out.