Depends if you want to upgrade the CPU and RAM as well since all new chips use DDR4 and your board is DDR3.
As far as a replacement you can probably find some cheap ones on ebay, craiglist etc.
The one thing to remember is if you change motherboards you'll need to reinstall Windows to avoid hardware/software conflicts unless you find the exact same motherboard. Youll also have to transfer your Windows key from Microsoft when you change the motherboard hardware as well.