Recently we got a new sofa bed off gumtree. It's an IKEA Karlstad sofa bed. I really liked the look and feel of the sofa but the legs that came with it had to go.
I applied 2 coats of the stain/varnish (you can put 3 on) make sure the coats are painted thinly and you must wait the recommended 12 hrs between coats.
After hours on the internet reading about how others had modified their IKEA sofas I came across these 60's styled round tapered wooden legs on Etsy. The shops name is Thirteen Colonies. All I had to do was tell the seller that it was for the sofa bed and not the standard sofa.
Delivery took between 2 and 3 weeks from Anerica to Australia which is understandable. I also had to get the wood stain/varnish and some felt pads to protect the wooden flooring.
I'm really pleased at how it all turned out. A great improvement.