Utopia

Here is a brilliant alternative from Utopia that saves you changing your whole dual seat setup -

"A driver's backrest that becomes a part of your seat. No bars in the way of driver's hips and legs or passenger's legs. Folds forward to ease passenger getting on or off and adds to safety by getting out of the way in sudden stops. Includes up and down height adjustment, as well as driver seating position, back and forth, to help driver sit upright to avoid slouching--a big factor in driver fatigue.

Backrest is concaved and pivots at top of bar as you lean against it so no uncomfortable edges dig into your back. Well padded, but only 1 1/2" thick which takes up less seating room than most other backrests. All Top Bars are finished in a Beautiful Black Powder Coat. Comes with handy pouch with strap to convert to shoulder bag."

For more information, visit their website at http://www.utpr.com/drifter.html