These days, I got these dust covers from Daiso (1 Borneo, Kota Kinabalu, Sabah) at RM5 each.
Be careful not to get the wrong size. Get the Under Bed or Clothes type. These are bigger and can fill up quite a lot. But these are fast selling items. I'd go to Daiso often enough to get em. Hehe.
Another alternative is to purchase the material from the local cloth shop at Segama's Wah Yoon. I've seen it there before, but not sure how much it cost. You'd though have to sew it yourself.
Some samples that I have.
These are my pinky street and miniatures.
How it's arranged inside of the cover.
This cover is for video tapes. I'd use it for my re-ments.
My figurines are safe from dust.
Hope this helps some of you guys with preventing dust.