The most expensive one I have seen to date on e bay fetched £144, yet less than a fortnight after that I bought a good original DU42 with only the glass missing for £78..that price included the ammeter and WD light switch...You just have to keep looking....Ian
Just bought a ammeter from montys classic motorcycles on ebay i paid twenty six pounds.
It is the correct one as i fitted it today.Type in lucas ammeter