Drive shaft options for 2008 800’s

I am looking for a cure to the loose slip yoke phenomena. I cannot find a rear slip yoke replacement for 2008. I am able to find the 2011 yoke by it’s self but understand that it uses a different size u-joint.

The question is, does anyone know if the 2011 shaft can be used as a replacement in 2008’s? This would allow the replacement of the yoke by itself in the future.

Does anyone know of a cure for the slop that exists in the rear yokes or is that just the way they work?