I am not sure of the origin, but I searched Luxio 8/17 on ebay and saw several listings for the cracked ice reverse holo variant. I am guessing they can’t be that rare. Knowing that, I am sure someone will have info on the distribution.
Probing the depths of the internet for more information, I stumbled into this comment from an old PokeGym thread.
“There was also Gliscor 4 and Flareon 4 from Rising Rivals. They came in special edition Christmas boxes at Target. Pop8 had Carnivine, Cherrim, and Luxio. Cnivine and Cherrim came with a booster and a pop pack. Luxio came in a pricey box set at TrU.”
I’m not sure what TrU is - but perhaps this comment will assist in locating the answer for 3/4?