If you found a supplier that offers Makopake inks then chances are it's a Union supplier that has access to their other inks. Makopake is good if your doing athletic type prints, as it's a high opacity ink. I think Unimatch is a better all around ink but that's a personal opinion. Union has mixing software available at this link:
Union Ink Company - Software
and I believe this covers their makopake series as well.
Hope this helps!