And these MAY fit, at £1.35 each for the lenses; I'm still working on indicator LEDs....
http://www.classic-car-accessories.co.uk/acatalog/Classic_car_parts_LIGHTS_5.html

By the way Nigel, have you thought about swapping your 'yellow-ish' sidelights to white.....thread and pictures here
http://talkmorgan.dev.justmoon.net/ubbth...e=0&fpart=4