Easy enough to make yourself if you cant find one. Use any old small nipple soldered end cable and a blue 'ring end' crimp terminl.
Fit inner cable as normal, cut the ring end off the crimp terminal, using a Stanley knife - remove the blue plastic crimp cover- you'll be left with just the internal crimp metal tube. Test fit cable, cut cable to the required length then use the crimp tube to create the loop end that hooks over the choke pull.
Ive done a few this way when fitting non standard carbs.