The luggage works website (I just learned about them from this thread) has a parts list.

But I'm curious, how do you attach your luggage behind your bike?

Sounds like a good idea. Which bags have wheels that can be switched out for 100mm scooter wheels?

Yeah, I should have looked for a replacement wheel instead of bringing it back to the shop.

I wonder if you can work backwards, and find luggages that are easily fixable, and pick the most rugged of that type?

Light use. They didn't break. The plastic/rubber decomposed.

Oh nice. The wheels on my Victorinox disintegrated after ~5 years and they charged me to replace them.