All the info gathered in one place. Also a link for hairpin legs sources.
Pretty Peg - They’ve produced a wide range of adorable legs that easily screw into the bases of Ikea sofas and beds.
Superfront legs work with Ikea (and most other) furniture--Angles High
Mid Century Furniture Legs — Ace Hardware Maybe I can turn basic furniture into MCM with these legs
… And learn the styles of chair legs as well 50 Amazingly Clever Cheat Sheets To Simplify Home Decorating Projects
Set of Mid-century Modern Furniture Legs Pretty IKEA Replacement Legs Black