For 2008 G37 sport AT...or the analog part from another vehicle. Mine got stuck then broke. Any input is appreciated, thanks

 

When we bought our '08, the spring loaded cup sizing insert was missing from the cup holder. I had to buy the entire assembly (including the lid) just to get that piece. I'm afraid that's what you will have to do or try and get one from a junk yard.

And no, I"m not selling my spare parts :-)

 

The only place you can get one reasonably priced is buying one form a junkyard. You may have to buy the whole center console, but if you find a damaged one you have hit the jackpot. They will sell you the whole thing cheaper, you can use the part you need and sell or throw away the rest.