I've bought my share of stuff from etrailer, we pass by it fairly often so I usually stop in for pickup. I agree, I like them.etrailer.com is my go to for trailer parts , quick shipping and great videos and tutorials.
That place and part number looks promising, I tried calling them, but they're closed for Good Friday, so it will be another 3 days to check on it. Thanks for looking into it. I'll let you know what happens.I was a little skeptical of the size posted because your picture looked like a larger difference in size from the inner to the outer. But again, a dial or digital caliper is your best friend.
Anyway how about this place? As long as it’s available, part number 4542 has your bearing sizes. You can always confirm with them other measurements but it’s likely the correct part.
After I get in touch with the place in Florida, I'll weigh my options. I want to keep cost down, but also do this right, and hopefully it won't have to be done again in my lifetime. This trailer was given to me by my son last November, so far I've got about $50 in it, so it's easy to justify some expense. I ran across a youtube video a couple weeks ago of a guy making his own dust caps just like what you're saying. Thank you for the suggestion.I would get bearings,plus a set or two for backup...
Run a bead on the old bearing race so it falls out of the hub.
Caps can be worked around as well.Mic the inside of the threads and look for a friction fit cap close to the size and tweek it to fit,or find a plastic cap that fits over the outside of the hub.Beer can on the outside or something like that.It's a trailer,not a show car.If you are worried about looks find some center caps for the wheels and they will protect the plastic caps if you go that way.
When i got my 18' car hauler it had bearing buddies on it.
The PO greased the trailer way to much,the seals were pushed out the back of the hubs on it and grease was covering the brakes,
I put regular caps on it and haven't touched the bearings since.No hot hubs the last time i towed it.So close to 25 years trouble free use.
I look at it this way, vehicles used to be rear wheel drive.I never once had to service the front wheel bearings in a 2WD.So long as the grease is kept clean(no water or dirt allowed in)i just feel the hubs when i use it to see if they need service.