https://www.etymotic.com/product/etyplugs-high-fidelity-earplugs/ (only 20 dB NRR but less expensive)
I'd go with the above Decibullz over the Etymotic though. You don't want to cheap out on ear protection, especially if you're shooting rifle/shotgun calibers indoors. I don't like shooting rifle or shotguns with earmuffs since they get in the way, so below are some other options.
My brother swears by these for shooting with a rifle.
I have these but I don't like the way they fit in my ears:
I have a pair of these on the way at the recommendation of another member: