Understood, use either electrical or mechanical. If electrical, the sender has to match the gauge. Use any gauges that fit and you may or may not want the same sweep, face color and markings. All up you you. Plenty of gauges to choose from. Local auto parts and internet. Find one that looks good to you and priced in your range. A mechanical will have no issues with matching a sender like the electrical one will.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn