I’ve seen them. I was kind of miffed when I first used a pump stove of the Whisperlite design, and the disadvantages of balancing a large heavy pan of hot water on top of a light flimsy burner on uneven ground really hit home. The springiness of the flexible fuel line makes it worse. The old “Primus” brass pump stoves that took Scott to the South Pole may be antiquated, but I think they’re a better design. I’d like to see a modern version with an aluminium toroidal tank with three adjustable legs, and the Nova burner fitting inside the toroid for storage and locking on top of it in operation.
I know a lot of people who love the Svea 123R, but I prefer kerosene over white gas, (safer, more widely available) and a pump over self-pressurisation.
Seems to me that a toroidal tank would be difficult and expensive to manufacture. Cool idea, though. I’d get one just for the niftiness-factor. Optimus no longer make the 8R, but there’s a Russian copy available for about $40. Pretty much the Primus/Optimus/Svea burner with a bigger tank and in a box. Stability shouldn’t be an issue. (It does burn white gas, though.)
At A & H Packstoves (the U.S. service company for Optimus and Svea) there is a Petromax kerosene stove that looks like a Primus 96. I think they’re made in Portugal, but they’re said to be identical to the original. Here is one by John Shaw & Sons (Wolverhampton) Ltd. that is being sold by someone in Wessex. This type of stove seems very popular over there. (search ‘primus’ and ‘stove’ in eBay Sporting Goods).
There’s an accessory pump for the 123R, by the way; so no priming. I can’t find mine though.