Try Howard Leight by Honeywell R-01902 Impact Pro Electronic Shooting Earmuffs are listed at 30 NRR and they are available for $79 at Amazon or $61 at Walmart.
https://www.amazon.com/Howard-Leigh...=8-14&keywords=electronic+30db+ear+protection
Howard Leight by Honeywell R-01902 Impact Pro Electronic Shooting Earmuffs, Black and Grey - Walmart.com
I have Peltor TacSports, and they're typically more than enough reduction for me, although I don't believe they are up to your reduction rating. However, I've worn foam earplugs underneath them at indoor ranges when shooting rifle before. Works like a charm. Definitely doesn't completely defeat the purpose of the electronics. You should be able to double up with no issues with whatever you decide to go with.
OP, have you seen the review thread that was posted a while back? Just thought I'd mention it in case it escaped your attention.
https://www.indianagunowners.com/fo...electronic-hearing-protection-any-budget.html