A while ago, the cheap plastic swivel-piece broke on a Swiffer sweeper, leaving me with 3-piece pole (the included 4th piece isn't really usable because of a non-removable handle).
The poles are actually pretty strong b/c each piece is short (about 10") with a 3/4" diameter. I'm guessing they are made of aluminum. They "seat" into each other about an inch (like a normal tent pole) and shouldn't come apart with downward force from a tarp and guylines. I removed a plastic clip inside each pole that attaches them b/c they seat so well onto each other.
Three sections of this pole measured almost 33" at 3.9 oz. To get 4 sections (around 43" tall), you might have to buy 2 sweepers. To carry them, throw a rubber band around the sections.
Btw, I never used these, they got thrown in the bottom of a gear bin. Your post just reminded me and they would be an o.k. replacement for those that forgot tent poles but could get to a store on the way to a trailhead.
Go to swiffer.com, click on products, and then swiffer sweeper. These are available at most stores like target and probably some grocery stores.