[BansheeBill]

You might be looking for an Irish Mail Cart.
I don't know of anyone making adult sized ones. Here's a webpage with a couple of hand built ones:

https://users.math.msu.edu/users/drachman/cycle/irishmail.html

[Leaning Right]

That Irish Mail Car is awesome! It’s just what I was looking for. But the link to the manufacturer is all in Chinese. No matter. It’s something for me to investigate.

Thanks

[Chickensoup]

As a child one of the riding toys inthe yard was an Irish mail. Years later radio flyer made a wood one the children had

[Tennessee Conservative]

I like those. I have a bum foot after falling on it almost two years ago. Doctor’s in Tennessee are too stupid to figure out how to fix it I guess. I rode a mountain bike 75 to 100 miles a week before I fell and can’t pedal anymore. I used to walk several miles a week too and now can barely go to the mailbox and back. I’m getting sick of watching tv and something like that could allow me to get out and exercise. The big hand powered trikes are heavy.