Frank Lupo has good rep.
google Dynamic torque converters for contact info
I use Lenny at Ultimate converter concepts and he is among the best in the business in my opinion.
Also google for info.
You will be a lot happier with a custom converter than an off the shelf , though some companies may have an off the shelf that will work.
But the specifics of your combination make their job easier to get it right the first time.
And quality is not cheap in the converter world , but the difference in performance between cheap and good is worth every penny.
Link to Lenny
http://www.ultimateconverter.com/
