[ken]

It's not that crazy. In other fields, there are stores for "alternative ___". There's a record store a couple blocks from me which sells every physical medium except CD. There's a car dealer which sells cars for every fuel except gasoline. There's many restaurants which serve foods with every ingredient except meat. There's government departments, education departments, and stores which deal in every language except English.

When one way is dominant, it's not uncommon for all the others to get rolled up into an "alternative" grouping. Any one of them by itself would be too small to amount to even a small store, but all of them together are a decent set.