Well I guess it helps to look yourself before asking .....
For Anyone who needs these answers as well.
The below has been cross referenced with 4 sites. One was official RAL Colours. And Missing-Lynx Thomas Jentz and Hilary Doyle.
1942 Afrika Braun RAL 8020 - no matching colour in Vallejo as per their own colour chart.
1941 Dunkelgrau RAL 7021- Vallejo match 862 black grey
1942 Afrika Dunkelgrau RAL 7027- no match
1941 Africka KhakiBraun RAL 7008 - Vallejo match 880 Kakhi grey ( olive green colour of first Tigers and DAK uniform Tunics)
1943 Dunklegeld nach muster RAL 7028 - no match for the standard factory base coat give to all panzers made after 1942.
1944 Olivgruen RAL 6003 - Vallejo match 890 reflective green, green used in camoflage pattern.
1943 Rotbraun RAL 8017 - Vallejo match 872 chocolate brown, brown camo colour.
1944 Primer Rot RAL 8012 - no match for primer coat.
So it turns out I was right Vallejo don't have a matching colour for the factory applied base coat of Panzer made after 1942.
I hope this helps you as much as it has me.
Gaz
Excuse me while I go repaint my latest AFV Club Tiger 1