what you want is a German "trekking" bar. using "trekking" in google will produce more results.

not the best resource, but a good beginning for someone who doesn't type German. in this catalog there are sets of "trekking" bars ... one that goes forward and one the faces rear-ward. in addition, all kinds of spacers and extra bars are described.

let me know what you think and we can work from there...

http://www.satoribike.com/satori_pdf/2013-SATORI-ok.pdf