Now I looked up Origo stoves in my local maritime shop on the web. It has used to have both the Origo 1500 and 3000 models (single and double burners), and lately also a slightly different version with the same sort of burner and alcohol canister; the Origo One and Origo Two. However, today I only found one Origo One in stock. It would not surprise me if it is now out of production.
I also have that little alcohol burner that you Graeme mention (or some replica of it). It works, but it is not fast, and it cannot be regulated, so is not an alternative for serious cooking, in my opinion.
Arne
PS:
The matter of different alcohol stoves has been discussed a lot here, earlier (search on ‘stoves’).
Now I googled the German word for alcohol stoves; Spitituskocher, and soon landed on their nice HPV Salsa (single) and HPV Mambo (double) stoves. They are not so powerful, at only 1000W, but they appear to make maximum use of the fuel, with their blue flame, and the power can of course be regulated. User verdicts are very good. They are used for camping and as a backup at home in case of electric blackout. They are shown on Youtube, as well.
If the more powerful and super simple Origo is no longer available, I would consider the HPV, which still seems to be in production. It’s blue flame should keep the kettles clean.