Neil, interesting items you're replacing! I attached a parts schematic with your parts highlighted so others will know exactly what you're looking at. I agree with Stig, new rollers (or sliders?) are always good. At 10K how do your clutch and clutch bell look?
With ordering just the moveable drive face, does that require you disassemble and rebuild your whole driven pulley?
I'd probably take apart my cvt and look at the components to see if anything else needs replacing? Moveable drive face, boss drive, etc.
You know we'll want to see pictures of the job...assuming you're doing it yourself