Peltor makes a re-chargeable option available now... I personally have not used these but I have used other Peltor or 3M PPE and have been satisfied.
https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-PELTOR-Tactical-Earplug-TEP-200/?N=5002385+3290832110&rt=rud