I'm looking for mag support items like stat boost k, invincibility, ect. It's been a while since I've tried looking for them and I swear they used to be in the photon shop(which has a few but not the ones I'm looking for) but now I can't find them there. Can anyone tell me where I can find those?

they are still there in the photon drop shop, however invincibility was never there and some other skills for mags never were there for obvious reasons, those you can find in the players shop or if you want to try your luck try getting then from UQs