Dustcatchers seem to suffer whenever OTHER PEOPLE use a tool. Here's how to make one from what you've got.

Step 1: Pal Wrecks Tool

Let's say you left your workshop for five minutes and didn't arm the booby traps properly.
If you've got any friends you might find something like this when you get back.
This is good. It gives you a chance to COMPLAIN. That's Number One on your Bill of Rights.

It looks like someone took the wire frame out of the dust collector because they didn't know what it was, then fed the dust collector to the beltsander. It must have been fun riding it around the room like that.

Step 2: The Normal Thing Would Start Like This.

Cut a piece of wire to jam into the holes in the collar and sew a new bag from a chunk of airline blanket.
If you don't have such a blanket you better start stealing them. Then you'll feel a lot better the next time an airline rips you off and abuses you. The appendices of "Wretched of the Earth" by Frantz Fanon explain how this works.

Step 3: Here's a Better Way

Take a couple of bicycle spokes you were saving for welding rod and bend them like this.

Step 4: It'll Be in the Stores by Christmas

Slide an orphaned fleece glove over the wires and lash it onto the collar with rubberbands and string.
Now that's a fine dustcatcher. It's got so much surface area it barely puffs up when you sand. It also catches dust really well.