Hi Annie I would have thought a good sheet metal worker would be able to repair something like that. But not having seen it and not having yet used the Origo I purchased near new a couple of years ago, I guess that is easy to say.
As we both know, Origos are as scarce as hen’s teeth in NZ and you rarely see them for sale.
However, you may be in luck.
Just by chance (I have been keeping a watch for the last 18 months) one of these was advertised on Trademe just this afternoon. It is in Tauranga, and I am currently not too far away from there at this moment. It was opening bids at $80 with a “buy now” of $150. If bidding starts, the buy now no longer applies, and I would expect bidding to reach more than $150 so, to cut a long story short: I saw it just minutes after reading your post, and decided on impulse to secure it immediately, by way of the $150 “buy now”.
The “fuel tanks” look OK in the photo.
If you think that will solve your problem, I can pass it on to you when I get back to Auckland. I am not sure whether or not it is a genuine Origo, but it may well be and if so, probably a bargain. No obligation, I am sure I can easily find someone else who would want it – you can have a look and have first option if you like.
(It's here if you want to have a closer look. I wouldn't mind keeping the gimbal arrangements and the pot-holder, which mine doesn't have, if you don't mind. They look to be home-made and added on, anyway.)