Try www.allbarstools.com. I saw lots of choices. I'd also look in a furniture store that carries modern furniture lines, like Ambiente and Ecko in Raleigh, NC.

I am not sure where the client purchased these chairs, I thought Pottery barn had a leather bar stool, but I don't see it there any longer, the Folio chair from Crate and Barrel is fun and comes in lots of colors. Good luck

what is the width of the bar