I was about to ask, but I ended up finding it’s replacement. I’m posting the location for others who migth be looking as well.
…Linux_for_Tegra/create-jetson-nano-sd-card-image.sh has been moved to …Linux_for_Tegra/tools/jetson-disk-image-creator.sh
I assume it was moved since it doesn’t only make sd cards and this was confusing. Thanks for that! Making it more generic actually saves me quite a bit of work!
Edit: actually, after reading the source it still seems to only create sd images… I am midly confused now.