Moustache bars, priest bars, touring, randonneur, bullhorns or substitutes

Hello all,
This is my first post in this forum. I hope I post in the right thread.
I'm currently building a singlespeed bike and I'm looking for a stem and handlebar like the one (not black) on this bike;
Does anybody know where I can find one?
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So far the only bars I can find is Nitto baby bull bars but they are very narrow. I'm looking for something 44 cm wide. I guess the other way would be to buy I charge slice and cut it before the curve.
I have never seen some web site to sell this stem also.

Thank you in advance for any helpful info.

The bike is from [URL="http://www.altabikes.no/"]ALTA Bikes](http://www.dpgr.gr/usergalleries/albums/userpics/14742/2927d1225967424-alta-ss-city-racer.jpg), but I can't find any spec sheets for it....so I don't know which handle bar was used.