i recently built a Inter-AS Option C lab, which i used a few years back when i was studying for my CCIE SP. Good for study of OSPF/ISIS/MP-BGP/L3VPN/VRFs. All done on EVE-NG (and I passed CCIE SP v4 using 100% EVE-NG).
The full walkthrough can be found here:
https://www.linkedin.com/posts/jamesjoy ... 57984-1atl
LAB files are in the blog posts, as well as attached to this post.
Enjoy !
James