You can frequently get NOS ones on ebay.co.uk, but it may be better to fit a solid state item that sets the voltage to a constant 10V, available in pos. or neg. earth, instead of an average of about 10V for the bimetal Lucas ones. Kees Oudesluijs NL [demime 1.01d removed an attachment of type text/x-vcard which had a name of coudesluijs.vcf]