The most popular merch at the US Open, from Honey Deuce tees to $600 Polo Ralph Lauren jackets

I regretted not bringing my own hat. Alice Tecotzky I checked out the items at the very (very) well-stocked US Open retail store. One sweatshirt is already sold out and reselling for more than three times the original price. Here are some of the most popular items, according to employees. A vodka-stained, plastic Honey Deuce cup isn't the only badge of US Open honor. Between its five different merchandise stores, most of which have multiple outposts, the annual tennis tournament also offers a…