Anyone know what sneakers Josh Radnor wears on How I Met Your Mother?

Every once in a while, Ted Mosby will wear a pair of brown sneakers with white midsoles, and I want them really bad. They look like Puma Romas, but I can't find any that look like them anywhere. I've looked at seenon.com, but don't know where else to look. Does anyone know what they are and/or how to find them?