| Are you thinking of any material or do you want a metal?
You could use plasticard sheet of whatever thickness you want or if you wanted a bit more rigidity you coulkd use the plastic laminate that two tone labels are made from.
If a metal was your preference then you would probably be better with aluminium sheet which can also be bought in whatever thickness you require.
__________________ 
“Dirty British coaster with a salt-caked smoke stack, Butting through the Channel in the mad March days" |