chara designs here: http://suptg.thisisnotatrueending.com/archive/22645864/
There's a cosplayer who's done it, and there's a good number of photos, yay:
http://fc05.deviantart.net/fs71/f/2012/046/4/f/eliza_cassan_vi_by_nebulaluben-d4pum90.jpg
http://25.media.tumblr.com/tumblr_lrmbfj6wAp1qer56zo1_500.jpg
http://nebulaluben.deviantart.com/art/It-s-not-the-end-of-the-world-258645379
http://nebulaluben.deviantart.com/art/Eliza-Cassan-IV-285283300
http://www.desura.com/groups/deus-ex-fan-group/images/eliza-cassan1
Eidos official discussion, really cool!
http://cdn.eidosinteractive.com/mtl/marketing/Community/Cosplay/Eliza_1
http://cdn.eidosinteractive.com/mtl/marketing/Community/Cosplay/Eliza_2
General description, etc: