I see it listed as part number T250004 and it looks like a standard 3/8s spacer from this helpful doc. Unfortunately it doesn't give the exact size. I guess I'll just remove the other size and measure it.
https://www.mtwc.co.uk/wp-content/u...-to-fit-cooling-fan-to-Morgan-3W-min.pdf
Last edited by Bobajobbob; 04/01/22 10:54 AM.