yeap, very similar but no tapered wing. If you ask me they are all Curare knock offs! :-)

The header that I have has a 1.5" offset. I really need another .5 or 1" more. 4.5" offset seems like a lot. Seems like I may have to make my own after all. If I can get my hands on some scrap 5052-O Aluminum I can bend it by hand pretty decently.