That's basically what I am trying to do. I am looking relatively locally for a wide frame hanger/mule drive assembly.Paul - based on your update on the other thread I believe you need the pulley assembly set up from a wide frame mule drive. I think you could switch it over to your narrow frame bracket, and use the spring from your narrow frame assembly as well. This would give you the angled pulleys. The question I have is whether the pulleys will be in the correct places after you do this. Hopefully Kraig and maybe some others can help with this question.
I called on Robinson FE when I was with IH service in the mid-70s. Dragoon's in Mooers NY bought them and they moved to a newer store east of town. Dragoon's in Mooers is a good source of IH Cub Cadet parts and equipment, they were in business since 1953.