Voltmeter Link
https://www.ebay.com/itm/US-Stock-Analog-Voltmeter-Panel-Pointer-Volt-Voltage-Meter-Gauge-85L1-AC-0-150V/391654706445?epid=2292367735&hash=item5b30708d0d:g:F68AAOSwIMBbmzjq
150 volt seams to be right sizes 6 cm or so wide
https://www.ebay.com/itm/US-Stock-Analog-Voltmeter-Panel-Pointer-Volt-Voltage-Meter-Gauge-85L1-AC-0-150V/391654706445?epid=2292367735&hash=item5b30708d0d:g:F68AAOSwIMBbmzjq
150 volt seams to be right sizes 6 cm or so wide