the close button on the console of my Lexus 2009 350RX popped off. Do I have to replace the console or can a new close button be purchased

Hi! You have two routes to go in this situation. You can either pull the console apart and "mend" the button with an adhesive (though if broken an adhesive will likely not hold up in the long run) OR you can pay for the replacement console and install it. Really depends on what you're willing to spend on the project. Sorry, we know this is really annoying to deal with. Hope this Helps!