Wheels look pretty nice, that black alternating spoke design takes away some of the "busy" look.
Here's a quick google, might be able to piece together a set from a couple vendors. The price from the dealers is over $50 each, what a scam!
https://www.ebay.com/sch/i.html?_fro...+caps&_sacat=0

This guy has make offer, maybe he can get you a full set?
https://www.ebay.com/itm/INFINITI-G3...NZZBbL&vxp=mtr

 

Maybe being oem wheels is the caps the same as previous g37 coupe oem wheels?

 

So I went on ebay and copied a VIN from a 2017 Q60 coupe with the same wheels. I found a infiniti website to plug the VIN into and then I found the center cap part number under the wheel section. The part number looks like it was used for a few inifnitis

 

Don't like those wheels. They look like a circus tent.

 

I don't think they're that bad, but Infiniti does seem to have some of the ugliest OE wheels of any luxury brand.

 

Pretty safe to say most of not all oem wheels that changed to the weird black and
​​silver color design are fugly