Ed Email me if you are interested, otherwise others have expressed interest.
I have 3 pairs of better quality Shurite Meters that you can have for my shipping cost if interested. These meters fit your18VAC/10 AAC capacity very well:
Voltmeters: Shurite 8412Z ,0-025 Volt scale. Ammeters: 8508Z, 0-15 Amp scale.
If you want to match meters for your 4th power district, Allied Electronics has the #8608Z ammeter for about $24-25. However they no longer show the #8412Z Voltmeter in stock. You can try Ebay. i did'nt find any cost-compatible 0-25 Voltmeters on the other Electronics houses--Newark,Mouser, Digikey, etc.
Light Object, Inc is a low cost house and has meters in the $10 price range but will show a different face on your panel. In your search be sure you are viewing VAC meters--many VDC are displayed. Most all panel meters require a 2" hole saw for mounting--and a pilot bit helps.
My little attic layout is dormant but it has the same PoHo power as yours--photo below. The meters on it are DER 670 units I used to import from New Zealand and sell (way back in the day}. They were assembled in Taiwan from Japanese components and distributed by Carrel and Carrel in NZ. The Green meter on the right is DC for my Tortoise motor circuit.
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