Well, since:
A. GX160 components seem to be fairly common across multiple Honda products and therefore seem to be more reasonably priced than old HR214/HR215 components, and
B. Some sources indicate that GX160 flywheels are compatible with GX120 & GX140 engines, and
C. Many Honda Power Equipment parts seem to share some commonality with other Honda product lines, and
D. I've stumbled across a source of GX160 parts that are locally available, and
E. If they're actually compatible with the GXV120 engine in my mower, then I'll make my wife (who sometimes mows the lawn and has a hard time starting the mower due to arthritis) extremely happy...
Then all I really need is expert confirmation that the flywheel from a GX160 will function on a GXV120.