I noticed that at the end of "The Chicken Roaster", Elaine shows the Urban Sombrero, on the cover of the latest catalog issue, to Peterman, to which he responds "The Horror, the horror!"
But
In "The Checks" when Jerry is standing in the rain, trying to buy an umbrella from Padilack(sp), a man in an Urban Sombrero walks by and the other umbrella vendor mentions how the umbrella business has suffered since the U.S. came out.