I actually had to look them up by their species name
I don't believe I have ever seen them! They look quite interesting, but they are certainly not common here on the West Coast.
Their slow growth and the difficulties encountered in propagation make them relatively rare in the US although, I have been seeing a few trees in the local nurseries the past few years. They are fairly expensive for a small landscape tree $100-$250. If you want a big one, get out the checkbook!
They are really cool (dinosaur) trees. Remember the amber headed cane in the movie Jurassic Park containing the mosquito that started it all? They think that type of Amber was formed from the sap of these trees. When you see their foliage up close it looks artificial (plastic). I understand that it isn’t even made of proper leaf material but, a modified stem structure. I’ve read that they will survive well as a potted tree (much like a Dwarf Alberta Spruce).
I’m adding a baby picture. You can find plenty of photographs of grown specimens by googling.
If anyone is interested, I’d love to swap seedlings with other individuals who have species that work well for bonsai.