Closer, but no. The pulley you are looking for is a single v-groove pulley.
Did you find out what is wrong with yours? Like someone above said, it's not an item that generally goes bad or wears out.
I don't know of anywhere you could purchase them brand new, perhaps at a Mazda dealership.
Should be the same for the 89-93 Mazda Miata. They did switch to a 4-rib micro-v at some point but I'm not exactly sure when.
