Where can I get a cardigan like this?

[NutellaWithEverything]

I am in the mood for a chunky cardigan similar to the one in the picture. What are they called? Navajo? I am in my 50s and short, so black with cream patterns might work better for me. Any ideas?

I would search for Aztec
I have a similar length Aztec cardigan from Passenger, worth a look

https://www.passenger-clothing.com/products/west-coast-recycled-knit-cardigan-black?pos=8&sid=c6c5b069f&_ss=r

I do like that cardigan a lot, although I suspect I'd need an XS and it's out of stock. Is it warm?

Have you looked on Vinted, lots of knitwear eon there at the moment.