Many moons ago, I bought a plug-in Black and Decker leaf blower / vac, model BV4000 Type 2. This is the closest I can find so that you can see, but this is a Type 4 so the blower isn't exactly the same:

https://www.amazon.com/Decker-BV4000-Electric-Blower-Vacuum/dp/B000Z83KCW/

The bag always kinda sucked (haha), though, because it's too small! I would vacuum leaves for every bit of 45 seconds before it was full. And I had a LOT of leaves, so it was more or less useless. I used it as a leaf blower, but the vacuum part just sat around.

Now I could actually use it for something else, and the bag is DESTROYED! It looks like it's mostly been eaten away by rats.

I've looked everywhere and can't a replacement bag, it's just too old:

https://www.ereplacementparts.com/black-and-decker-bv4000-type-leaf-hog-high-performance-blower-vac-parts-c-4167_9502_9511.html

So.

Here's the outlet for the chopped leaves / mulch:

What do you think about getting some kind of tall bag (maybe a burlap sack), cutting off the sewn end to make it a tube, zip tying one end around the orange plastic, then laying the other end in a lawnmower trailer in the hopes of blasting the chopped up leaves or whatever into the trailer?