Anyone ever seen or used one of these?

http://www.demartinibags.com

My bag is De Martini, but it doesn't look quite like these. It has a plastic window pocket in the front, plus it's purple, so it's really ugly. But I like the way it feels and it's built like a cinderblock.

These seem really cheap, and I like the idea of canvas instead of nylon.

Does anyone know of a shop in NYC where I could check one out?