Morris Minor Owners Club

Does anyone know of where I can get a template for the headliner for a Mkii (1956)? I cant justify the cost of buying a new one (£78:00). I am a dab hand with a sewing machine and have appropriate material at hand. Also, does the old one just 'pop out' or are there bear traps along the way?
BTW I've searched the treads.

I've gone 'off piste' and am repairing the headliner with high temperature spray glue and old canvas backed OS maps. Gives the passengers something to look at and makes the interior rather funky