I'd like to thank everybody who has repsonded to my enquiry. Thank you very much.
I currently have a complete air-conditioning kit, which I understand was originally designed for the 'Ascari' road car. The kit includes various NO. 6 and 8 hoses made up with fittings.
However, no bulkhead fittings are included in the kit and as I need to pass the various hoses through a number of bulkheads I need to modify the existing hoses and get new ones made with the correct bulkhead fittings.
Your replies have given me some food for thought and I have also, in the meantime, found a company near me who install air conditioning systems and freezer systems into light trucks and vans. I have asked them to make up two hoses for me, with a bulkhead fitting. If they are okay then I will get them to make the rest of my requirements. If they are not okay then I'll have to take a different tack.
Regards
Alastair