Actually Mark, it would be amongst the very last FC models produced, Nov or more likely Dec 1959 I would estimate.
PPG Technical Services department can almost certainly help you with modern equivalents of those colours. (I'm tempted - very tempted - to say dark primer and light primer, but that wouldn't be very charitable
)
Ring Dulux-PPG customer service, tell them the year, the paint name and code and they'll be able to find it and suggest two-pack or acrylic alternatives:
PPG Australia
Customer Service & Technical Support
13 24 24
Toll Free Fax
1800 800 819
Hope that helps,
RET