While I haven't purchased any bumpers, I would have to guess that Ames, Classic Industries, and Original Parts Group would be the top 3?
Ames, is kind of loosing their stronghold after changing hands... they just don't have the same relationships with manufacturers as Steve Ames did, and it's starting to show in the industry fast. OPG and Classic are owned by brothers and they are mopving fast to become the best... and it is starting to show.
But... your best bet, is to find a straight original, and have it rechromed if at all possible. Or if the price is right, us a repro to make it a driver, and keep hunting for a good original to redo down the road.
By the way, I'm originally from MN. Hibbing, then Bloomington right near Kennedy High... my oldest brother went there. Then we moved to Apple Valley and then Burnsville... than San Francisco, and now Seattle! Still have a sister in Bloomington.
Welcome to the boards! You'll find a ton of info here!