Hi Sian If it wasnt for the foot rail, I'd thought the stool was a side table and looks uncomfortable to sit on, but try Gumtree - you may find pre loved Vincents for a song. I'll save you some legwork, or fingerwork :) check these out. http://www.mattblatt.com.au/Barstools.aspx?s73#p=2&ipp=28&f=v73-pv71-nBarstools-t71-c0&o=Default https://www.justbarstools.com.au/ https://interiorsonline.com.au/collections/all/category-bar-stools I love the choices in the last one.

Good luck with your bar stool selection. I completely agree with your choice to buy from a shop rather than online. I've included a photo of 2 white stools I purchased (if they suit the look you're after). A word of warning - after seeing them in someone's kitchen photo from Houzz, I bought them online. Both stools arrived badly packaged with dents & scratches on the wooden backs & both had faulty gas cylinders so seats wouldn't go up. A refund was granted months later after PayPal investigated but I had to pay to return them (cheapest freight was twice what the stools cost). Now I will always buy from a shop!

Before replacing your curtains as this can be quite expensive for such a large window, if they are in good condition, add a band of extra fabric to the bottom in what ever suits you, your existing curtain track can then be moved up to the ceiling for good looking full length curtains without the large round eyelets, could save you a lot of money, I would look at replacing/removing the sheers cheers

Black bar stools would look great, one or two pendants over table would look beautiful downlighting above island , this would then make a feature of your pendants above table.