Have you tried Model Technics in Shoeburyness? They are the premier fuel manufacturer and blender in the UK, and also stock separate components. www.modeltechnics.co.uk Their D1000 mix (of the 3 diesel fuel blends they produce) is appropriate for a Dart, but the PAW might use either D2000 or D3000 (the latter being a blend for ball raced motors)

'ffkiwi'