My chin is in a double Ferret Nation cage. It's a fantastic cage and she and I both love it...though I'm not sure it would help much with dust, as it's still a wire cage.
Are you leaving your chin's dust bath in the cage all the time? If so, you should take it out and only give him access to it for a few minutes once or twice a week. That's all they need, as too much access to dust can cause some health problems. Also, it massively cuts down on the amount of dust in and around the cage. I just put my chin's bath in her cage for a few minutes right before I clean it, and then all the dust gets cleaned up with everything else.
Also, are you using loose bedding, like aspen shavings? If so, you might consider switching to fleece liners and just giving him a litterbox with shavings to pee in. Wood shavings can be a bit dusty, so less shavings will mean less dust.
Here's my chin's cage so you can see what it looks like (it's an old picture, so the set-up is a little different now, but it's still the same cage):