I have spoken with three very helpful people, but one has came up trumps - he knew of a modern equivalent to the unobtainable Sevcon switch elements, that are produced by Schaltbau, - not identical, so not a straight swap, which means you would have to modify the carrier, but as we don't have a carrier its no problem, I will just make one to fit.
I looked into getting some and they are quite expensive to by new from a UK supplier, then he told me last night of a source in the USA where I have just bought 4 from that with tax and shipping are less than 1 in the UK !
- here is an initial CAD design I have done
![Image](http://www.classicmachinery.net/forum/images/userpix/2345_2FFMRD3EJ7Y8K1582994059.jpg)