Looks like Etihad is selling Etihad Guest Miles-

http://www.etihadguest.com/en/earn-miles/buymiles/

redirects to

https://storefront.points.com/etihad-guest/en-US/buy

Though it seems that Points.com hasn't encrypted the link/server yet so I would be wary buying or entering your details until they do.

Some interesting possibilities in buying points from Etihad rather than via AA.com to redeem for Etihad flights. YMMV.