Ah, a set of Taylor Numo plates! You might not get anything
exactly like those, but Framptons & Tippers both now seem to do decent passable pressed 3 1/2 plates that I would say are in an authentic 1950s style. In both cases it might well be worth talking to them and see if they can tell you if they've got any genuine old fonts on the rack.
Beware of those who use ghastly over-thin plates with totally unauthentic fonts. They stick out half a mile on the line. I've only bought repro '70s reflective plates so-far but every now & then I see a plate maker at places like Beauliu etc, and one of their styles jumps out as being "just right". You just have to take a look around as not all makers have the same fonts or the same "eye" for what font & backing goes together. If you ever get the chance, I can generally say if a particular style is particularly authentic for what dateline if I see a picture of it....
http://www.tippersvintageplates.co.uk/ http://pl8s.co.uk/index.html (Framptons)
If I had to be put on the spot here & now, looking at their websites, the Tippers plate is the one I'd go for myself as regards "niceness" of style....
FURTHER; From whom did the current plates on the Hammond Gordon come from? If these are repo plates as I think they might be, then they are absolutely detail-perfect for genuine 1950s Homo Ltd (Stop tittering!) & Green Bros Ltd plates....