Piston Rings

Hi guys,
I’m currently in the last stages of doing the DragonFire 857cc big bore (kit #DFR-2PR85BB) on my 2012 800. I snapped one of the 85mm piston rings today and I need this machine back together by Wednesday. I can call DragonFire and hope they overnight a set of rings, or does anyone know if I can use any 85mm piston ring??? I’m located in NY so anything overnighted would be cutting it close. Please help, any info or suggestions would be greatly appreciated. My annual trip to Hatfield-McCoys depends on getting this motor back together!!!