If getting your hands on one is really difficult and you don't want to shell out extra money for a training gun, then make a mock-up yourself.
The dimensions are usually available online, then get an old floor plank, or glue some cardboard together and cut to roughly fit that size.
A bit trickier with revolvers but doable.
You cannot wake someone who is pretending to sleep. Stop pretending. Wake up.
Doubt: ...it's the only thing I'm sure of...
-Marsupials: Nature's idea of Concealed-Carry-