I miss Arm and Hammer too... damn you Tami!
It's been an eye opener looking for litter online during lockdown.. who pays £30 for one bag of the stuff?
I only buy the cheapest budget clumping kind because I go through a lot of it. I have found that they are pretty much of a muchness honestly.
I love scooping the litter boxes though, find it very satisfying!
By the way, you will get no grief here over indoor cats. Most of us here on the forum keep ours indoors.