I probably could have made one myself. I have one from Track of the Wolf that's made of aluminum. I don't know who made it; the handle hurts my palm and it can warp when when I use .457" bullets and a cheater pipe on it. It was about $20-$29?
I bought Powder Inc.'s cylinder loader when I bought some powder last week. It's robust and simple, but sort of crudely welded. I could have built one, but it would have taken more time and skill than I have. It gets the job done and it comes with all the extra arbors you need and you can rig it to cut wads, since the arbors and stuff are threaded for easy swap out, which is a great idea. I think it's worth it's price, about $69 including shipping to my house.