PN's I know about are 78180-60210 for pre-8/92 and 78180-60310 for post-7/92.
Never seen the later one to know what's different about it.
I've seen really crap quality aftermarket replacements but genuine's appear NLA.
For the early one, there appear to have been three revisions - 78180-60211 up to -60213.
No idea if they can substituted for 78180-60210 as a drop-in part. Meanwhile every know and then I spray some lube into each end.
Never seen the later one to know what's different about it.
I've seen really crap quality aftermarket replacements but genuine's appear NLA.
For the early one, there appear to have been three revisions - 78180-60211 up to -60213.
No idea if they can substituted for 78180-60210 as a drop-in part. Meanwhile every know and then I spray some lube into each end.