Start here, even if they would not be the vendor of your choice to purchse:
https://www.planopower.com/oem-parts select "Honda", "Lawnmower", and then (based on your info), HR-214SXA#1, and then "Piston" and check the engine serial number range for the parts against your block. Note that *every* ring set part number has been superceded (some many times!).
(For what it's worth, I looked at all three serial number ranges, and they all point to ring set 13010-ZE6-013. This is consistent with mynexperiencenwith the GXV-140 - the piston/cylinder is common to all, and only options such as PTO, etc. vary . . . Oh, and thqt part no. is for std - they also list oversize, and often other brand alternates . . .)