I ended up buying my own from Honeyman Aluminum. They're the absolute best and worth the money. Chained it up every night. I acquired 3 over the years and the neat thing was they'd last 2 years before requiring any maintenance. I'd ship them back for a total refurbishment.
UPS used to buy these from Honeyman but the company got cheap as usual.
In '00, I left a box at a door at a dump of a house. Before I could get back into my van, a middle-age shrew of a woman came boiling out and began to rip me a new one about how stupid I and UPS are for "leaving your handtruck at my house six months ago."
She opened her garage door and rolled out a Honeyman hand truck with the folding extension and stair climbers.
Then she scolded me alI about how I should be fired and that I was lucky she kept it all that time.
She never noticed that I was FedEx Ground. And I did not bother to correct her. Mostly because I couldn't get a word in edgewise. And so I rolled the handtruck to my van, and used it daily for many years.
In '15, I bought a new one as a spare. When I ordered it, I sent a pic of my old one as a model. The woman taking the order said " oh, that's the model we used to make for UPS."