I have yet to chop the beer holder off my bike and install this home-made bracket (will have to wait to do it next week), but I drew this up in SolidWorks today based off the schematic posted by Mitt in May 2008. His schematic was good, but a little vague when it came to arc lengths/radii so I made my own knockoff version with more in-depth dimensions and thought I'd post it for anybody that might want it. Feel free to leave feedback or any questions.
A quick sidenote for those of you that would like to draw up your own CAD model, the outline of the plate was done using splines that I curved to my own tastes, so it's not an exact science. Also, the horizontal and vertical dashed lines are centerlines and are used only as points of reference.
(http://farm6.static.flickr.com/5208/5229639272_90317eb2c2.jpg) (http://www.flickr.com/photos/37041615@N08/5229639272/)
Ducati Monster Tail Chop Bracket (http://www.flickr.com/photos/37041615@N08/5229639272/#) by clamoreux (http://www.flickr.com/people/37041615@N08/), on Flickr