Hi, thanks for the replies, I have had contact from a guy in Durham who may be able to supply one, through the web as not proved too successful.
Matt, when you say Enfield diesels, which engine do you mean ? Enfield rolling chassis are the best available for smallish diesels to be slotted into (with a few mods). My diesel uses the 412cc Fuji Robin, if you want more details try
Classic Motorcycles Ltd on their website under 'publications' there are write-ups on the Robin, and it's the actual bike that I own, and at one time in it's life had a sidecar attached,

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Hatz German diesel engines are also fitted into R.E chassis and cost about 5k, and in the latest 'Old Bike Mart' there is a Chinese built copy of the 406cc Yanmar featured, with prices from £2950 for the kickstart version and from £3250 for the Electric start one.
Royal Enfield Motorcycles - PricePart Motorcycles - Tel: 01454261941 - Email: henry@pricepartmotorcycles.co.uk I have gone a bit

sorry, I can understand the less than flattering reports, but it reminds me of the old BSA M21 that I used to have, It's a matter of 'horses for courses' if I want to get somewhere quickish I use the R80...did I say quickish???, Work, local trips XLR125,leisurely countryside rides then its the Diesel. The fastest thing about some bikes is there depreciation, but the fastest thing with Diesel bikes is the way sensible knowledgeable people want to speak and ask questions and show genuine interest. BTW the ultimate website for Diesel motorcycles is
DieselBike.net The Original Diesel Motorcycle website. especially interesting are the pictures of the 'Ernie Dorsett' creations of which my bike is one. I am always willing to help or chat about the 'diesel' and hope this as been of some use.