Gents,
Tomsclassic on ebay has apparently found a box of old hardware they haven't produced in years, and they're up on ebay.
These are 55-59 frame mount brake booster brackets that use the stock pedal location. They are very heavy duty! I picked one up for my hydroboost brake setup I'm working on. Only caveat is they come with no instructions and Auto City has no advice on installation.
It closely resembles a bracket I've seen DIY on the forum here.
There is a bracket that lines up with the stock pedal and appears to extend/lower the mounting point for the rod... not sure why it was included, but someone must've felt it was necessary. I think it would certainly allow you to chop the height of the pedal, which makes this bracket even more valuable !
LINK TO THE BRACKET ON EBAY