Peterm,
the 3 chrome pieces around the heater levers are removable and replacable, if you can find them. Getting them out (in a LHD drive car) would involve removal of the glove box, radio and maybe the clock to access the 3 10 mm nuts that hold them on. When replacing, don't overtighten the nuts, the studs are pretty easy to break. You really wouldn't want to glue the chrome pieces to the dash, this would make heater control removal/installation impossible.
George Davis
'69 280 SL Euro manual