This newer style adjusts to a full 90 deg. and is 1" closer and 1" higher than std. adjustable angle risers (because it attaches at the bottom and swings at top versus at the front side) also gives a nice straight stem surface for mounting devices.
MC Heads Up Stem Angle Adaptor 31 8mmx110mmx1 1 8" Stem Black Adjust Stem | eBay
(found one in UK and Taiwan)
Last edited by ebikebike; 09-01-15 at 08:46 PM.