I found my X-Blue through stringforum classifieds
Regarding stringing, I have also settled with gut mains and poly crosses, currently TourBite 17. With tension at 24/22kg, my arm feels fine.
Like many others, I also started testing Donnays because of arm problems.
Actually, when I played for a while with ProOne, I used a multi, could have been X1, maybe I need to string one with gut/TB and give it a try.