Long shot, but as there are some old-school bushwalkers here...

Getting back into cycle/ski touring (best thing about vaping eva!) and need one of these again - don’t care if it is the R version or not as long as it holds pressure. Has to be made in Sweden (it will have 'Made in Sweden' as opposed to just 'Sweden’ embossed on the tank). Would also be interested in an Optimus 111/C.

Looks like this: