Reply To: TIMING CHAIN SPROCKETS AND TENSIONER

[tavistock]

Might be worth asking the club spares contact. Have you tried http://www.renold.com/products/sprockets-and-accessories/ or

Lancaster Vintage & Classic Spares or

http://www.kipmotor.com/Catalogs/ORPHAN5A.pdf

Might be worth comparing the tensioner and sprockets with other engines. The Nash Metropolitan had the 1200 engine but it might be a B series, these people in the USA sell the timing gears:

http://metropolitan-restoration-service.com/metropolitan-parts-catalog/catalog