Hmmm...the closest thing I can think of is those 16.9 oz (I think) bottles that have that same elegant taper to the neck, but those may be too big for your needs.
I was wondering if these metric bottles would work with the caps used in the US. It happens that I just now finished a 11.2 oz bottle of Troubadour Magma and broke out my bench capper. The cap seemed to seat properly from what I can tell. FWIW.