So far as I can tell from HP PartSurfer
and the service manual, the only way to change that roller is to change the entire paper pickup assembly. The part number for the latest version is RM1-2755-080CN.
You will need sight of the service manual for the installation instructions as a fairly extensive strip down is involved (all the cartridges, the transfer belt, duplex fan, front cover, output bin, fuser, upper cover, rear lower cover, left cover, and a small bracket and an internal cover along the way). It doesn't look that difficult a job, though it is unlikely that you will chance on the correct installation method without the instructions.
I'm not feeling that happy with HP. My fuser sleeve is damaged; toner sticks to part of it, ruining the printed pages as it comes unstuck. The sleeve is very hard to obtain (I can find some mention of it on Australian eBay whilst I'm in Europe) and there's no instructions to strip down the fuser and change the sleeve in the service manual. Instead, the service manual tells you to fit a complete new fuser and that is the only part listed on PartSurfer.
This leaves me with little other option than replacing the entire fuser, which is in extremely short supply and therefore only available at an elevated price <sigh>.