non/ves 800 polaris rebuild questions

I have a 2001 non/ves engine that is very well known for having the PTO bearing go out!!!!! I have seen a lot of info on putting a wider bearings and drilling out the oilers on the bearings and was curious how much work and how too's.Also where can I buy the parts or what size/specs do I need to order the right ones.Are there any Case Mods? etc.... Also I do need two non/ves cylinders that are re-niced. Any help would be very much appreciated!!!
Thanks all