I have been to my local TLC branch, they have similar but wrong diameter tube and smaller circle, pins wrong also they were on the inside. To go into a magnifying lamp they need to be on the outside of the ring, so they dont interfere with the lens.
I bought one of these https://www.ebay.co.uk/itm/Ex-Pro-Round-...EBIDX%3AIT&_trksid=p2057872.m2749.l2649
but it was too small to fit.
I bought one of these https://www.ebay.co.uk/itm/Ex-Pro-Round-...EBIDX%3AIT&_trksid=p2057872.m2749.l2649
but it was too small to fit.
