If you can find the springs and the the 2 brushes for the linkage, you'll be onto a winner. Pack new grease in the 'box' and you'll have a freshly rebuilt linkage, with a shorter throw. Plus while its apart you can either get the 2 linkage arms re-zinced or respray them bronze/gold.

You'll need a vise to cut the stick, I didnt have decent tools so a local garage just sorted mine out for £20.