/cgl/ - Cosplay & EGL

Im doing my first shitty diy project, since i want to get into the "stop buying/do own stuff" state and thought it would be a good beginning with something small. i wanted to create a holder for my blowing horn and kinda stuck at the keeper peaces, since i dont have any rivets to connect them with the other parts. is there a way to connect them without rivets? i thought of sewing both overtopped layers, but i dont know if that would work.