I don't personally know of a kit but bet there is one out there, HS.
I have a Comet CVT and the final drive/chain sprocket is between the backing plate and the driven gear. (wrong side of the transmission/gear reduction) So would have to be jackshafted over to run a chain to the rear wheel.
Think your most likely to be in DIY land with that sort of set up and engine. But good news is many really talented people have done it and you can see and find lots of workarounds.