Something like this?
That´s a custom 90° Frame (89°, 88° whatever due to copyright regulations) made by a guy over here in Germany. He´s also done some halfblock cockers all by himself, i.e. designing them from a stock cocker body, programming the cnc, having it custom eloxed and everything. Halfblocks are really rare over here...
Check his website:
TX Tuning and maybe contact him for some advice. (Click the "Kontakt" Link on the page, there ought to be an email there...just tell him you´re from the US)