11X2 Spreader and Park Brake Lever

I bought some B body brakes to put on the 8 3/4 that I'm building. Someone has gone through them before but they have been sitting in a barn. I can clean all of that up and get new wheel cylinders if necessary. I'll do the same with the drums and replace if they are no good.

My problem is that they didn't come with the spreader bars and springs, or the levers for the parking brake. Does anyone have parts that would fit this backing plate? Thanks for any help you could provide.

1700436428530.jpeg