Hot Rods Can Anyone Identify This Backing Plate

I am restoring a 1946 Solar midget and I can’t identify the backing plates. I need to determine what they are so I can find the brake components. The drums are 2”X10”. The two smaller holes in the position where the anchor pins would go are threaded. As far as I can tell they are not Ford or Chevy. If anyone can help I would appreciate it.

 

Crosley?

Denny

 

I thought possibly Crosley but I believe they are too large.

 

Crosley's are 9 inch