Thank you for your comments.
Growl....
I live in Sydney now, if its hard and expensive in the UK it'll be damned near impossible to get it fixed here

Hello: newbie here, enthusiastic about my new camera. Couldn't afford one in 1980...
But: I've done the same thing others have clearly done: bought a body with a crumbling sticky bumper strip which didn't stand up to a few shutter presses- the mirror closes up on it and !!! black sticky crumbs and gluey bits on the screen and mirror.
The mirror's fine but the screen is now a smeary mess and needs replacing.
Rather than bust up another ME for parts (and any EBay sold replacement may have the same problem anyway) does anyone know if I can buy either a replacement screen, or if any of the parts still available for newer pentaxes would fit?