Well the best people for speedometer works are on Montgommery road. u can go there and ask anyone about them they will guide you to heir shops because their is a whole street in which they have shops and cars can easily go their.
there are 3 different shops over their but the best is Jubilee meter works and another guy by the name of century i guess is also good. jubilee works is a bit expensive but their work is best and expertly done.