Commodities are sold just the same as any other component, remember? So presumably if you just take the stock components and set their "Is Commodity" flag to TRUE, then they should behave like commodities, except they'll appear with their normal rarity and location
Hmm, looks like it's time for a mod... (digs out SJ's store modder and promptly gets nowhere

)
Darn, that won't work... there's no way to control the price of a commodity at a particular location - it's set in the component file, not the store file!
