Instrument bulb sockets

A lot of the white plastic tubes, that the instrument illumination bulbs push into, are broken on my 92 Defender. They become brittle with age & break easily. I’ve got several where the bulbs are just tape in place!
Does anyone know if these can be bought separately as they seem to be an integral part of the instrument. Alternatively has anyone come up with a solution?

Unsure if rimmer bros sell these. That are a standard rover part.

Had a quick look..
I think you need the earlier white ones. But this gives you an idea on costs

It’s the white bit shown on here that’s broken. I think it’s integral with the instrument and they snap off

Or contact Smiths Instruments directly https://www.smiths-instruments.co.uk/landrover/defender-90-110 or Caerbont https://www.caigauge.com/

TRYhttps://www.ebay.co.uk/itm/304155940144?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D234476%26meid%3D68984ae1140f419799efc48a841c11ab%26pid%3D101195%26rk%3D4%26rkt%3D12