Here is the cheapest new mesh jacket I've seen. Shadow Cool Ride Mesh Motorcycle Jacket - Competition Accessories Foam vs. CE armor, etc. to save on cost. May work for you.
Competition Accessories and Motorcycle Helmets, Motorcycle Jackets, Boots, Luggage and Gear - Jafrum are a couple of my go-tos when I'm looking for cheap "house brand" alternatives to save a buck.