Not really a suggestion...nor is my bike a Hilsen...but I ended up with a similar bar on my Quickbeam, a generic "Masi" branded swept back flat bar (it was a take-off from one of their "Soulville" bikes). Flat black, too...not great aesthetics but it feels the best of the bars I've tried so far on that bike:
http://www.flickr.com/photos/85709120@N07/8135411607/Soma also makes the "Noah's Arc" bar which is similar. Nitto also has
this swept flat bar, with a bit more of a "segmented" look. Then their are the various Jitensha/MAP/Ahearne/VO Postino options, which have a bit more going on in terms of bends.