This is an unashamed begging post- if you have the carseat but don't use the cupholder, pleeeeease will you sell it to me?
DS absolutely loved the cupholder when we got him his new big boy car seat, until one day we lost it under a van parked next to us. We couldn't retrieve it, and when we got back to the car the van had gone, but so had the cupholder 
. There were many tears. Tried and failed to buy a new one, tried a couple of generic ones but they didn't fit. This was in May, and DS(4) is still going on about it. Virtually ever time we get in the car. He has now asked Santa for a new one for Christmas, and apparently it is all he actually wants, so I duly contacted Joie again but they are currently still out of stock, and not expected back until after Christmas. Have been to a few retailers locally but none of them have spares.
So yes - if you have one and don't use it, or are about to chuck out or sell your Joie Bold and would sell me the cupholder, I will be eternally in your debt!