Re: trailer replacement spindle
Hubs are pretty generic.....all you need is to pull it off and see what size bearings it uses. Should be 1-3/8" inner diameter bearing and 1-1/16" outer bearing diameter. If it's a 5 lug....it's probably a 4-1/2" bolt circle.
Northern Tool is a good on-line source and Tractor Supply has some hubs too.
Also you can replace just the bearings as they are what wears out or corrodes over time. Easy to tap out the old bearing races......tap in the new ones and your good to go. One thing to remember.....when you re-assemble, don't tighten the bearing too tight with the nut. Snug it down until you feel a little drag while turning it, and then back it up until the cotter pin hole lines up in the nut and it's good.