This chart shows all the martial arts known to exist in the world. Consult Oriental Adventures for the values of the numbers under various columns.
After discussion with the group, I decided to alter the costs for Special Maneuvers from 1 proficiency to one-half a proficiency. This allows a character who is not just a martial artist to eventually master a style. However, learning the base art itself does cost one full proficiency. Arts and maneuvers can be bought with CIPs, just like other weapon proficiencies.
The first table below lists the arts and maneuvers from a Dragon Magazine article. The second table is from Oriental Adventures. The third table is two arts that are specific to my game.
Refer to Oriental Adventures page 103 for description of maneuvers.