Harold Leight models are good. My friend gave me a few safety orange plugs that rate 33db.
My custom made gun show plugs(early 1990s) rate about 39db. I still use them.
For ear plugs, see;
www.surefire.com www.cabelas.com www.brownells.com www.natchezss.com www.midwayusa.com www.nra.org www.uscav.com .
Surefire is a highly rated brand. They make top ear protection. NRA markets the ZEM style which look good. UScav.com sells the GI/milspec plugs.
CF