I didn't think that the TH350 used a kickdown cable, they use a vacuum modulator for that purpose. Are you sure that you have a TH350, it may actually be a 700r4, they have a kickdown cable on them. Either way, I would suggest that you try Jeg's or Summit, or possibly Lokar. They should be able to get the part you need as far as cables are concerned, you may have to fabricate the braket if one is not available.
