Thanks guys for all the ideas. Looks like it time to make my own. Anybody worked with putting extra mounts off the back bone down to each head like on some dragbikes? Seems like it would help take some stess off the cases.
ride to live tshoe
I think that I'd still also want a brace between the two cylinders at the top. The one I am running now, I did pretty much make myself, but I started with an aftermarket one, then added metal where I could to beef it up. I check it regularly too because once that breaks, it is common to then break the case mount to frame on the front left side. As someone else mentioned above, you can also break the case around the bottom of the cylinders down to the timing hole. I also found that using a Balance Master on the front motor pully or sprocket, made a big difference in how smooth the engine felt.