Fleemo17

My '92 Miata is in need of a new set of tires. Called my local Costco tire center and they told me it was questionable whether they could get anything that would fit my car. Looked on America's Tire Store website and they only had three tires that might fit, and I wasn't familiar with any of the brand names. Is it difficult to get tires for the original Miatas now? Where do you guys go to find them? And lastly, any recommendations? Just doing city driving to and from work. Tires are 185/60R14. Thanks in advance.