Google Groups : alt.rec.bicycles.recumbent: "If you can't get it, you can make one. All you need is a piece of 1 -
1/8' tubing and an aheadset style MTB handlebar stem. Get a 130
degree model in whatever length works for you. Many brands have a 130
in a 120mm length, which will give a 4' offset. Some brands also have
130s in 135mm.
See http://mnhpva.org/meetings/June_02/Dawg.html and scroll to the
bottom for a really bad picture of what I mean. It's a bit clumsy
looking, but so are the welds on the Cannondale stem.

Another option would be to keep the stock stem and try to find a BikeE
NX handlebar, which comes back about 4' and, if adjusted properly,
gives much better steering ergonomics. "