Yes, there are people who make them. Porch Electric is a recommended source from us here at OCC. You can find a link to their homepage in our "Resources" section under the heading of "Cub Cadet Parts Sources"
To save you the trouble of searching and looking here is a link to their E-Bay webpage and the harness you are looking for.........
E-Bay.
What is wrong with your harness? It takes quite a while to replace one. Can it not be repaired?