If you mean the brackets in the center of the dash going back to the battery box, I didn't find them at Moss, and after getting the number from the parts book (601939), The Roadster Factory shows them as NLS...no longer stocked.
Flea-bay or maybe someone here on the forum has some. Also, they're not complicated pieces so if you could borrow one or get a drawing, they look like they can be easily made by someone with a bending brake.