I was googling "marina abramovic" "amanda kleinman" and this Facebook came up -

https://www.facebook.com/scott.verrastro

So I went to his friends and searched Amanda and found this page -

https://www.facebook.com/kleiny41

I am 99.9% sure this is the same one, because she's in a bunch of DC groups and her former profile picture says "Art =/= Evidence"

Still digging, but thought it was important enough to share!