What kind of head rack do you want?   I guess I don't see what you are bitching about on the Winkel.

I would like to see a step in the sides to that the headrack conforms more to the shape of the cab, but it seems like nobody does that anymore.    If you will wait for it to be built, I'd bet Winkel would do it. 

Economy Mfg in Sedan is another one which builds quite a few.   I think they are about the cheapest around here. 

http://www.economymfg.com/