presumably you have tried the Dutch site?
if you have the machinery make the bushes your self, Im in France at the moment but I do know there is a service bulletin with sizes of bushes on. knowing British parts stores and designers its possible that later bikes used the same bushing so see if you can draw one up and check against the list. ebay might have some listed, you could try BSA bush in search and some sellers list size s on listing.
there are some bushes currently out of stock for the B40 which Ive found under Triumph numbers.
someone specialist like MArk Cook PES https://www.ccm-britain.co.uk/?xhtml=xhtml/homepage/default.html&xsl=homepage.xsl or Steve Riley at Piston Broke in Bristol 0117 941 2300 can make, or our own Rupert Ratio is well known..
if making yourself allow for interference fit on outside dia and a reaming allowance on bore. a phosphor bronze or similar is ideal, brass can be used..

Thanks for the welcome, I have printed off the membership form and will be posting tonight when I walk the dog. Thanks

Ive just bought a C25 with B44 engine. There are no sparks, and it has no battery.
It is fitted with a' MINI MITE by R and R' ignition system, and there are no sparks.
I cant find any details about this system ,so I can fault find.
Anyone know about this system?
Mick

Hi Julian & Bob - I did look on Burton bikes website and it was not listed, however I have just come off the phone to them, having spoken to an extremely knowledgeable Carolyne who said as the 4 spring clutch is not specific to the Spitfire I may need a new cage as well as a hub, dependent on what year clutch it is. So she has given me a casting number to look for and also a description of the different chainwheels so as to determine what year clutch it is. But once I have sorted that, they do stock the thrust washer.
Will let you know how it all ends up.
John.

 

Just a suggestion.

Look on Ebay UK and see what US imports are going for, Then knock off about 40%-50%. Should give you some rough idea.

Mike