alt Hacker NewsI'm currently going about it the other way, specifying custom magnetics to suppliers. Suffice it to say there are a lot more variables when you get in to manufactured designs, which may involve multiple coils, thermals, various component type options (SMD, THT), disparate wire types per coil, various footprint options, multiple core options, load modulation, etc.
I don't envy you at all. I'd ship a working prototype and say 'like this one' :) My ability to spec this would surely become an exercise in finding all of the ways in which I could mess it up.