Searching for "Dualit toaster" on Amazon brings up their classic line as the first result. While available in a range of colours both the four and six slice versions are advertised as "Built for commercial use." https://www.dualit.com/products/original-toasters

My aunt had the six slice version rated for 240 slices an hour when she ran a bed and breakfast. I've also seen the four slice one in smaller cafes. All in the polished stainless steel finish of course.