Evo 7 GT-A 2002 - Transmission Update

Looking for a specialist for the automatic transmission in a 2002 Mitsubishi Evo 7 GT-A perferably located in southern Ontario Canada. Need to update the wavespring in the transmission to keep it from granading itself. If anyone has an evo specialist and they know anything about these transmissions reply to this post please or point me in the right direction. Thank you in advance.