Just a few pictures of a simple add on to the press. Bottom is 1/4" plate with two pieces of 3/8"x2" angle for the female and a 5/8"x3" piece for the male. Some scraps finished out the side guides and I can do quite a few different types of bends as long as they aren't supper tight. Hope my simple rendition will give you a reason to build one yourself. Obviously not an original idea. Pictures are a little dark, but you get the idea I'm sure.
http://lh6.ggpht.com/_CWRtuk2VBho/TNv7VUDt0_I/AAAAAAAADMM/WJ9cXprhjG0/s1600-h/IMG_0159[1][5].jpg
http://lh3.ggpht.com/_CWRtuk2VBho/TNv7Wqp1FaI/AAAAAAAADMU/mBSF818N3nY/s1600-h/IMG_0161[1][4].jpg
http://lh6.ggpht.com/_CWRtuk2VBho/TNv7VUDt0_I/AAAAAAAADMM/WJ9cXprhjG0/s1600-h/IMG_0159[1][5].jpg
http://lh3.ggpht.com/_CWRtuk2VBho/TNv7Wqp1FaI/AAAAAAAADMU/mBSF818N3nY/s1600-h/IMG_0161[1][4].jpg