Previously it was available but they remove it while back. And from the last year no answer is given here or anywhere else.
With the new LG 34um68 (2560x1080 )and 34um88 (3440x1440), I'm also looking for one and hoping I can go with the smaller one and using VSR.
If AMD doesn't want to lose customers to NVIDIA they rather add VSR for 21:9 aspect ratio...
I have a R9 Fury but can't use its full power because of driver limitations!