Raglan "Little John" tumble-reverse gears to fit the Mk.1 and Mk.2 lathes. If unsure which model of Raglan you have, see my article here: http://www.lathes.co.uk/raglan 
Tumble reverse gears for the Raglan "5-inch" lathe can be ordered here: https://store.lathes.co.uk/parts/raglan-5-inch-tumble-reverse-gear