I would say you should go directly to the manufacturer. I have a list of the names of the manufacturers but not their direct info. Maybe this can be usefull for you in finding a manufacturer.
some of the major manufacturers of golf balls today are namely, Ben Hogan Golf, Bridgestone Golf (parent company of Precept), Callaway Golf, Dunlop Sports, Hippo (largest golf equipment manufacturer in Europe), Jazz Golf (largest Canadian golf manufacturing company), Kasco Golf, Maxfli (a division of TaylorMade), Nike Golf, Ping Golf, Pinnacle, Precept , Pro-Curio Golf, Srixon, TaylorMade Golf, Titleist (most famous name in golf equipment and is the leading ball company as well), Top-Flite / Strata (a division of Callaway), Vulcan Golf, Wilson Golf, and Yonex.
Hope this can help you a little.