Check in the yellow pages under Audiologist. We make custom ear plugs all the time. Usual cost is between $30 and $50 depending on options like flourescent colors, handles, cords, etc. We can also make them in hypoallergenic materials if you are allergic to plastics. If you're in the OH/WV/PA area let me know and I can put you in touch with someone.
Joyce (an Audiologist)