mallory unilite weights

[ChargerMad]

hi, i have a mallory unilite distributor with mechanical advance unfortunately one of the pins has snapped  on the weights which holds the advance spring ,does anyone know where i can source one as i live in the uk and its not worth sending the unit to mallory for repair. the unit is a 37 series yl type. do all 37 series use the same standard weights whether there  counter clockwise or clockwise rotation .Any help appreciated thanks dan