contact ABI and ask if there is a paint code on the Identity plate like there is on cars. look for the plate either on tow bar end or body work low down by door take note of all details then phone and ask about paint.
First try  http://www.abiuk.co.uk/contact_abi
seems to be the static part of the company.
       or 
ABI Caravans Ltd
 Swinemoor Lane
 Beverley
 Humberside HU17 0LJ
Tel:01482 862976
ABI Caravan Specs
                
 Bob
                
 April 2012