Try the gun shows. A couple of weeks ago I got lucky and found an ammo dealer who was selling Federal Premium 12 GA 3" sabot slugs for $4.95 a box, such a deal!!, I bought all he had. 3" slugs are particularly hard to come by these days. Also Dick's sometimes has them at a decent price. I love using 3" slugs now that I have a shotgun that doesn't kick like a mule, and they go exactly where you aim them at up to 75 to 100 yds., no lobbing like with the 2 3/4" slugs. Good luck on the ammo hunt. Here's a shot of my boys at the range for their test firings.