LIMA HO set controller/transformer

I have just found a circa 1979 Lima set in the loft with track , engine, carriages and it seems to be designed to operate with a transformer. Problem - no transformer - can anyone supply spec for this transformer ie input and output voltage AC/DC etc

You should really try the Model Railroader forum.If this is an HO or N gauge set,you can get a 12 volt DC power pack at any hobby shop.