jubilee brake shoes

1) Do you have the originals? If the shoes themselves are in good condition, they can be relined. Look in Old Bike Mart - I found 3 suppliers: 
*Classic Brake Services, Whaley Bridge, SK23 7JH - 07811 356619
*Villiers Services, West Midlands, DY5 1SD - 01384 265797 (£25 pr)
*Custom Brakes & Hydraulics, Sheffield, S20 3FG - 01142 767971

or

2) You may be able to buy new shoes from your Regular Norton or AMC supplier, as the Jubilee has Francis Barnett front & back wheels & brakes.
Jubilee Front shoe c/w lining = P No 21646
Jubilee Rear shoe c/w lining = P No 23423
(TBH - I thought they were the same front & rear - you learn something every day!!)

AJS 250 (same brake!) Front & Rear shoe c/w lining = P No 043277

For Norton & AMC, Try Russell Motors, RGM, Norvil, AMC Classic Spares, NOC Spares, AJS & M OC Spares....

Good Luck!