So I'm going to take a wild guess that a lot of us on here grinds their teeth.

I've recently discovered that I grind my teeth, and am now getting some pain from it :/.
So, my question is, since I should obviously get a mouth guard for when I sleep, does anyone know of where I can get a good one for cheap? I know that might be a little difficult to find, but I just would like to know if it's possible.

Please & thank you