Ask PG: Ever Considered HN Store?
...Working exclusively with one print company (for manufacturing) and selling high-quality t-shirts (for starters). YC logos, hacker slogans, and tech images on each.
Storefront could be a clean and spacey UI - following pre-established HN design standards. Or the store's UI could be built off API to third-party 'online store builder' application - a past YC startup comes to mind.
I'm sure you've considered it already, so I guess the better question is: Will you ever sell HN-inspired gear through HN?