Menards has the "Highland® 40"-74" Expandable Cargo Bar" [menards.com]
for $4.99 through 12/7/2019. This is $15.00 off their regular price for this item and about has cheap as I have ever seen them from anyplace else.
I had 2 of something similar but they disappeared when the kids took a load of their old belongings home a while back.
If you don't have a local Menards they can be shipped to your house. I did a test order and found they would ship 4 of them for about $11.00 which would make the price about $7.65 each delivered. (YMMV)
They don't take up much room and very handy when ya need them.