Is there any advantage or otherwise in the new fangled digital gauges ?
New analogue meters are going to be rather expensive compared to new digital meters. Even just decent-quality new analog meters will probably cost $75 to $100 each for volts and amps, and close to $200 for hertz. You can buy high quality used one's on ebay for much less, but it's going to be a challenge to find them all in the same brand and model so that the faces all look the same. The hertz meter will be the hardest to find, because they're almost only ever used in the generator world. If you don't mind some different faces, and want analog, used off ebay is probably the way to do it.
Even the cheapest new digital meters can be superbly accurate once they are properly calibrated. Like everything else in the electronics world these days, it's substantially less costly to manufacture good quality digital than to manufacture good quality analog.
A meter is a meter, but I agree that analog meters are probably a better looking fit to the style and era of the Lister.