Where can I get the Throttle handle plastic sleeve

[Nomad2day]

Throttle handle plastic sleeve is split in half that goes on the handlebar and inside the throttle grip.
Where can I get one?
Will a Harley sleeve fit?
I was putting on new throttle cables when I noticed the sleeve was busted.
What a heart breaker...try to put it together and need something else..
Neil

 

[RoadRider]

I believe it is new grip time . The Big Dog has 1 1/4" or 1 1/8" Id. grips and a Harley has a 1" Id.

 

[BIG HOUSE]

My throttle started sticking and my sleeves were shot. Luckily I had some aftermarket roulette grips on the shelf and they dont use the sleeves.