DONGLE

Hello guys, i had a problem, i have razer nari ultimate headphones... and there was a problem with dongle, my computer just couldnt find that device even when i plugged it it... so i was googlin and found out that if u get rid of that plastic cap, it should work... but i broke it... is there any way how i can buy new one? cuz here i just see dongles, but not for razer nari ultimate headphones... Thanks...