Jetworks Jets are made with Extruded Polystyrene sheet (XPS) which is easy enough to be found worldwide. Different manufacturers produce various ‘recipes’ of foam that result in soft grades or harder grades.
Wherever possible use genuine Depron brand.
There are numerous other brands out there, and it is a case of looking around to see what you can find.
I recommend typing into Google
‘Aeromodelling board’
‘XPS Sheet’
;XPS Underlay’
