You can get that meter from Element14 (Farnell). Part Number is 143509
https://uk.farnell.com/multicomp/mc3...509?ost=143509
Download the datasheet and check the measurements against your meter, I think you'll find they are a bolt-in replacement. One thing though, you may have to open out the hole where the small lightbulb fits into that meter but this is a simple job to do.
Mike