Hot Topic, a chain of retail stores specializing in “apparel, accessories, gifts, and music for teenagers”, has a M*A*S*H t-shirt for sale on their website. The direct link can be found here. If you’ve got one in your area and you want a M*A*S*H t-shirt you might as well check the place out.
Regardless of whether or not anyone will actually go out and buy anything from one of these stores, the fact that a retailer targeted at teenagers has a shirt related to a series that went off the air long before any current teenagers were even born is fascinating. It is true that some younger people do stumble upon the series in syndication but still, this was a bit of surprise.
(Thanks to Jayna.)