Hi, they look like Little Diamond tiles from the Dwell collection by Heath Ceramics based in San Francisco. I know because I saw a picture of them and loved them and hunted them down! I even got them to quote for shipping to the UK but the cost was prohibitive for us sadly. If you're in the UK and find anything comparable, please let me know!

Have you though about using a luxury vinyl tile such as Karndean or Amitico? With the right floor prep you could end up with a very neat finish where it meets the tiles and not worry about expansion gaps. The wood effect versions of luxury vinyl can be very realistic and extremely hard wearing. I have used this product quite a bit in recent months even completing a gym in my own house just this week. www.fusionfloors.co.uk

When you say 'practically new' how long are ypu actually talking? Tiles tend to have a shelf life with suppliers of 3 years or so. So you may struggle to get them again. However, you would need to start with the usual suspects such as Topps Tiles, B & Q, Wickes etc before moving onto specialist suppliers. Good luck!

Evening. Do you have any photos please? Which way do the windows face, so what lights comes into the space?