Ouch! Didn't see your location. Yeah, single digits suck.
I'm not a fan of chest rigs either. I bought a cheap Condor(airsoft) setup on Amazon for my first race. It gets HOT in the summer and it never fit well- I'm 5'11" but have a smaller frame so the shoulders and chest were always too loose.
All that said- I'm happy to loan it out for a race. I'd be willing to drop it in the mail and let you return it at the event. If you're interested send a PM.