**disclaimer: I work for Londonist**

... and we have a merchandise partner who produces print to order t shirts with various Londony designs, among them place names and postcodes. So I asked them to put up a Bowes Park N22 one. And they did.

The t-shirts are a little pricey as they're print to order, and let it be known that Londonist gets a small commission on sales, but that said they are nice quality, come in men and ladies fit and the customer service is really rather good.