I haven't seen any at Walmart in years. Some of the local gun shops get in a few boxes from time to time. There is an Academy in the next town, about 35 miles south of here where I pick up a box or 2 anytime I'm in the area.
The only place I've seen it consistently is Adventure Outdoors in Smyrna. That is a long drive, 60+ miles, so I don't go there often, but if I'm in the area make a detour there. They have had it sitting in the floor on pallets for over a year. CCI minimags are $10/100 rounds. They have been selling Norma TAC 22 ammo for $5/50. The Norma shoots well in my guns.
I can't remember the last time I saw the cheaper bulk 500 round boxes anywhere. The stuff I've been buying the last couple of years is more expensive. But shoots so much better I probably won't go back to the cheap ammo even if it becomes available.