Try this on for size. This is a flip up style for about $13.00. He also has a stainless steel version avail. I e-mailed hime about fit in Xfires. He answered back very fast and recommended this one. He also showed one that is currently under development that will be stainless and fit with hooks into your carpet.

www.ultimatecupholders.com/fischercupholder.html