upgrading a vpi scout


hi what would be a good arm to upgrade the jwm 9 to a better tracking one for a decent price.
Convert?fit=crop&h=128&policy=eyjlehbpcnkioje0ota1mjk2mdysimnhbgwiolsicmvhzcisimnvbnzlcnqixx0%3d&rotate=exif&signature=33656fb4b3154a053f20bad15d74c8bc61dbf5b6dd97bd7798a22437f0f766b9&w=128pataldorr