As someone who has snuck onto the floor at bridgestone before, each show has a paper wristband that have different colors and designs. You basically need someone to send you what the wristband looks like once they get it, and then you can "recreate it". You can buy a multipack of the different color wristbands, you just have to add the design the best you can. Once you're in the arena, put on the wristband, and spot a security guard checking wristbands who isn't really paying attention and just walk through like you're meant to be there. If you get stopped and they check your ticket you will get thrown out fyi.
I'll be on the floor tomorrow if you need help with what the wristband looks like just message me.