Here are some shots of the "conventional" junk tray that mounts just fore of the shifter, and just behind the heater box in 90% of our cars.
It is 7.25"x7.25"x 2". Would appear to be of aluminum construction.
This is sitting as you would look at it from the drivers seat of a LHD car....

Top View- not sure if the screws are original.

Bottom View

Ciao!
Steve