Voltmeter information

Guys,
I need a 5A/1105 0-20 switchboard type voltmeter. OR….pictures or dimensions or substitutes. Obviously it is for a 12 V. system and I have not been able to find a picture on any website to give enough information to even attempt looking for a like kind instrument. A possible solution would be the unit that RAF Surplus has for sale, but again what does the original look like.
The Hendon Bulldog has a “hole” where the original would be located.
Would appreciate any help. Thanks.

Cheers,

Ed