I'm somewhat reluctant to suggest this seller. His ad makes it sound like he's in California, but the center caps are sent from Spain and take a while to make it to the states. Also, his ad says they are chrome, but the 4 I bought from him were silver, not chrome. Also, the part number on the photograph in his ad does not relate to the caps that I thought I ordered. Having said all of that, you might want to check to see if this seller will sell you a single center cap:
https://www.panjo.com/buy/set-of-x4-color-crest-chromed-wheel-caps-370642
Had I to do over, I'd get him to commit to what I was actually buying before I sent him any $. Of course, YMMV.