Where to buy actual jeans for kids (not the modern stretchy kind)?

Where to get actual jeans for kids (not the modern stretchy kind)?All I see sold in stores and online now for kids jeans are the elastane/spandex kind that are more like stretchy pants than actual jeans. They are much less durable and don't last. Where can I find the regular heavy 100% cotton ones like they used to make? The kind that were indestructible. Levi's doesn't have them. None of the brands do as far as I can tell. All of them say 1-2% elastane to make them stretchy pants. I've noticed even the jeans that aren't labeled as "stretch" are still made with elastane.

We had some kids Levi's that were made in the 90s and early 00s that are practically bulletproof, they just don't fit anymore. Super thick and heavy denim. Tried new Levi's and all of them were like yoga pants. Trying to size vintage online is a pain in the butt but if that's our only option I may consider.