I started to wear earplugs about a year ago. I've been using the rubber ribbed kind...(haha) with the attached lanyard so I don't loose them....or the expandable foam kind. I only wear them for one day then throw them away. A local racer makes custom fit plugs but he is in the Chicago area....Ron Hix...Hixracing.com...
I know a few people use this site also....
Ear Plugs, ear phones and white noise machines for everyone, Earplugs for Musicians and Swimming!