I purchased a set of two of these great speakers, but I only needed one to replace the center dash speaker in my car. This should work in pretty much an 3-1/2" (87mm) car speaker location. $40 for local pickup in Santa Cruz County, or $50 to ship it within the U.S. via USPS Ground.
That saves you $60-70 compared to buying a whole pair of your own off Amazon if you only need one like I did. If you’d prefer Priority Mail, UPS, or FedEx, let me know. It might just add a couple bucks.