shower window pivot broker

Attachment 50458 (http://www.doityourself.com/forum/attachments/designing-kitchens-bathrooms/50458-shower-window-pivot-broker-937e9bda61d284f35f22de0cec1980e03a2d65e68842e7bc47ae0103456d2d93.jpg)Attachment 50459 (http://www.doityourself.com/forum/attachments/designing-kitchens-bathrooms/50459-shower-window-pivot-broker-4640bc62a92bf19cef60360485dd1898da82231a192487e1966c777e3e645c74.jpg)Attachment 50460 (http://www.doityourself.com/forum/attachments/designing-kitchens-bathrooms/50460-shower-window-pivot-broker-7c8c65a4156778ceb2681b341369c1011abc63a2ffcda9516f755308ffa6867a.jpg) By shower window bottom pivot is broken . I have no idea how this can be fixed. I am not sure if this is a standard piece, since it was there when I bought the house. Any ideas, if this piece can be replaced. I put pictures of the top piece also, in case it gives someone an idea