I looked everywhere but could not find replacement clear lenses for the side repeater indicators. Eventually I had a pair made for me by a machinist, from a block of clear acrylic.

The lenses are just a push fit into the rubber grommet, for a competent machinist it would be easy to copy the dimensions.

You then would need orange bulbs. I could not source the correct bulbs easily in orange, though they must be available (in my Volvo wing mirrors for example), so I painted clear bulbs with Tamiya clear orange enamel - a model paint, one small tin will do hundreds! It's been through the MOT since, no issues.

I will post some photos later.

Nigel