Does anyone know of a source to get nerf bars for older karts? I have a '01 Nemesis and my son has a '02 Infiniti Jr sportsman champ kart. My nerfs are fine but I want to get a swoop body when I replace mine and I'm afraid that they are too tall. My son's are a little banged up and I'd like to replace them. I have a tubing bender but I don't have any dies near small enough and I'd rather just buy new ones than try to get setup to build them. Do chassis manufacturers usually continue to sell nerfs/bumpers on karts for several years after they are produced? Thanks in advance.