Thanks Wombat and Amberwolf.
I have the tool to take off the Chainring, in fact
so no issues there.
I have, however, little knowledge how the freewheel is constructed. From memory it seems that there is a mechanism in the centre which could be taken off, but with some special tool which I don't know yet. Once that part is taken off, then I can try to source the replacement.
All this talk about Elation demise makes me think if I should start a technical thread to "Self-support" the product. From a quick glace on the internet:
Motor mechanism => Identical to Cyclone (but are the cyclone clockwise?)
Throttle mechanism => The "ORO" marking looks identical to Cyclone
Battery => Should be able to source from ebay, Ping, etc.
That small guide gear => Cyclone
Chainring/freewheel > = Unknown. But perhaps a full chainring set could be bought from Cyclone?