Sure wouldn't be tough to build a set... Some mandrel bent tubes, some straight tubes, a pair of flanges. Tig weld them all together and send them off to the chrome shop or ceramic coating shop.... Best part of building your own, can make them fit the car correctly.....

But the question begs to be answered..... Why a set of weed burners???? Even with baffles they're nothing but obnoxious and would be a guaranteed cop magnet......