The hubs were specified as Bayliss Wiley No9 and No10
These are seen in the (1952)
Brown Brothers catalogue p100
so 32/40 hole, small flange are the key style indicators to look for.
for the paint finish in the
Classic Lightweight search engine search for flamboyant and you will read how it was done and some examples, including this
1949 Harrison and
H Lloyds has a range of decals
as for gears, remember that the gear range was limited. The derailleurs just didn't have a large capacity. Just look at the illustration in the 1955 Carlton catalogue for the bikes with a front rod derailleur. It is very hard to see the two chainrings!