Anybody have any recomendations for a good, sturdy paper that has the roughly the same dimensions as a double LP (roughly 12.25" by 24.5")?

Im hoping to fold the paper in half and drop it in the LP bag to make a front and back cover (simliar to a lot of cheapo 45s)

I havent been able to find any sheets that wouldnt result in a bunch of wasted paper come trim time. And record accessory places like bags unlimited seem a bit spendy. Anybody else tried this, or have suggestions for cheapo LP covers?