I use old plain brown cardboard boxes, cut 'em up and just draw a circle on it, with a magic marker.
Stick it on a real estate sign frame I get free from the daughter, and 'bingo'.
Got myself a dozen targets with frames for free.
I shoot a lot.
Wish I had the money, I've seen some really cool stuff they sell to shoot at, 'Cheaper-Than-Dirt' type magazines.
But I hate to spend money I don't have on targets, the ammo is bad enough.
Good idea though, printing or just sticking a paper target over the cardboard, wouldn't be that much more.
Some nice targets at that link. Maybe I'll save some for "company"...