Just do a google search for them- more or less a conventional upright adult trike.
My impression is that they tend to be underused due to being viewed as an old person's bicycle, although I've seen a couple set up as lowriders, too. They should make one that is about a foot longer on the rear, with a huge basket, and that might pick up interest as a utility bike.
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"be careful this rando stuff is addictive and dan's the 'pusher'."