WANTED: Speed control/ brake for Standard Talking Machine

[GrafonolaG50]

I am fixing up a Standard Talking Machine Model A for a lady that works at my college. It is missing the original speed control/ brake plunger assembly. I believe some Columbia machines used this same brake. Please PM me with a price if you have one that you are willing to sell. It does not need to be pristine, but it does need to work.
Thanks,
Eli