Bending 2" diameter pipe/tubing

[sanddrag]

I'm looking to bend some roughly 2" diameter steel pipe/tubing (can be thin walled) into a 180 degree bend such that when I'm done, I can get a half circle of diameter 18" or so (to the outside). I need 4 pieces to come out as close as possible. I can't have it kinked or severely deformed. I can pay a shop to do it or I can invest in a tubing bender as long as it isn't too expensive. I'm thinking I need to get these 4 pieces bent for under $200. Should I have it done somwhere? Where? Would this be something a muffler/exhaust shop could do maybe? Or should I buy a bender? What kind? Would this do it? http://www.harborfreight.com/cpi/cta...emnumber=32888 If it takes like 8 tries to get 4 like ones, that is okay but I will need 4 like ones in the end.

Or better yet, is there something that exists already (tube or solid actually) round that is already approximately that diameter material and that radius of bend that is a half circle or more?