I'm in love with the blue and cream cushion but I can't find it anywhere! The pic was taken from a house being sold in London, perhaps 6 months back. Surely such a fab cushion is still available in the market. Please help me :)

I used non-slip on my leather sofa- the stuff you put on the floor to stop rugs sliding. It did help keep sofa blankets etc in place but I must confess a fabric sofa (which I now have) is much easier! Alternatively, could you get the back and seat cushions recovered or do it yourself if you have a sewing machine?

I see no issue in buying an ex-display piece. The green colour looks much better in the photo than I was expecting! I also see no issue with having 2x sofas in the same style but different colours. I’d go with the second sofa in a pale grey. I’d then get neutral scatter cushions to sit on both sofas and bring in some plants to complement the green. Couple of images showing two different colour sofas works fine...

There’s an eBay seller called modernancient who has mostly mid century stuff. You can also just search eBay for 1950s furniture or 1960s furniture and that will bring up you loads of midcentury items. Also worth looking at your local auction house, our local one has masses of mid century furniture every week.