Good to know... wish I'd known it sooner, but now I know how best to fix it when I next have it apart.Those unsealed Chinese wheelbarrow bearings will get sloppy in my experience. We've swapped many of them including on my own FJ40. The time/fab to replace was 100x the cost delta of using a sealed bearing with the same dimensions from a bearing house.
As for the 90363-18038, we a dozen in stock regulary @ Cruiser Outfitters, part# ST18038