Google powerlink 918 22.5
I cant remember where I got my belt for the chinadoll. So just c&ped your numbers into google, and this link popped up.
Seems to be a bunch of choices. I'll say this, I dont promote anyones belt, but in the web printing press business, I saw Gates belts way way more than any others for power transmission applications.
maybe this
https://www.google.com/#q=powerlink+918+22.5&tbm=shop