The Hornsea studio line was made in England from the 1950s to the 1980s and was popular there...but unfortunately, it's not that easy to find in the US. If you're willing to pay a pretty penny you can get pieces on ebay and etsy (mostly from overseas)...but the chances of stumbling upon some while thrifting aren't great. Unless, of course, you are lucky enough to live in the UK.
Most of my favorite pieces were designed by John Clappison. I kind of want to get this book on his life and work. From amazon UK, of course.