You can contact the dealer from whom you purchased it. Also you can contact an XTAR authorized distributor directly:
America go to either www.xtardirect.com or www.xtarusa.com or www.xtar-store.com These are three different distributors.
If not in Connecticut as in "CT" then check this post: https://budgetlightforum.com/t/-/28759#comment-644424
Best wishes