Late to the party, I know. I just redid my deck a week ago and remembered this thread, so I thought I'd throw this out there for the next guy.
The spindle assemblies appear to be sourced from SST. Both the bearings and the housing are marked SST. The bearings are Chinese, though I don't know if the entire assembly is imported. The fact that the OEM sources them as an assembly suggests that other OEMs may use them.
If they aren't destroyed, the spindles can be rebuilt. The assembly consists of a spindle, an outer housing, two 6305-2RS bearings, and a spacer sleeve. You can expect some galling and corrosion when you press the bearings out of the housing, so the seats and spindle will need to be cleaned up. When clean, the spindle should be a slip fit in the bearings, and the bearings should be a press fit into the housing.
If you have a bearing that's running hot due to failure, you can expect the bearing seats to get stretched. So long as the bearing doesn't chew up the housing, a stretched seat (i.e. a slip fit instead of a press fit) can be fixed with some loctite retaining compound, but YMMV. The inner races are clamped by the sheave bolt and spacer sleeve, so make sure the bearings are seated fully in the housing.
For what it's worth, the idler pulleys will wear out first in my experience (about 700-1000h). They each have a single 6205-2RS bearing. Drill out the 8 rivets and debur. Replace the bearing and use M6 or 1/4" bolts and locknuts (or just use loctite) to reassemble. Further replacements are simplified.
For the curious, this set of spindle bearings lasted 1700 hours. I should've taken pictures, but I didn't. When you change belts, pay attention to the center and outfeed spindle condition, particularly the bottom bearings. If it's about 1500h or so, it might be prudent to just change the bearings when you can. A catastrophic bearing failure will likely turn the repair from $40 to $200.