Hi...I'm not a Leica man but if I was there is only one place I would try
FFordes are very good, I bought a lovely contax G outfit and am delighted with it.They are not however the greatest on trade in values, I did much better selling privately and on Ebay.
One place not to try is the real camera shop in Manchester.
This used to be very good, but recently their prices are not competetive
come back Nobby !