Moho Pro 360° Mouth Upgrade

I already have a fully functional Moho Pro 360° character rig; the only area that needs attention is the mouth. I’m aiming for noticeable gains in BOTH mouth-shape design and overall lip-sync accuracy, with a special emphasis on tightly matching the dialogue track to the correct phonemes/visemes... (Budget: $30 - $250 USD, Jobs: 3D Rigging, Animation, Character Animation, Character Design, Moho)