That's a pretty simple chock set up .
Take a look at bicycle cables available from Walmart . 10 bucks for a pack .
You might have to solder your own end on the cable , but that's all of a couple minutes time .
Or reshape an existing cable end ...
Always more than one way around a bush . ;)
You might check a mid 80s Suzuki FA 50 choke cable . Seems like the same set up .
The FA cable has a metal bend . but ...
CABLE, STARTAR 58410-02200 (edited)