I have found this on the interwebs. A really useful interchangeability guide
https://www.lotuspig.org.uk/home
Lotus Parts Interchangeability Guide
There are a couple of other resources too that I've stumbled across:
https://www.gglotus.org/ggpart/elisexref.htm
https://wiki.seloc.org/a/Part_Cross_Reference
https://www.gglotus.org/ggpart/elisexref.htm
https://wiki.seloc.org/a/Part_Cross_Reference