if you mean 'an adapter plate to fit the stereo in ...'? I couldn't find one either!
The best I could manage was to buy one for a Ford Focus, fit it upside down, make up some new, longer retaining tabs and Superglue them on (the retaining tabs at the bottom (which was originally the top ...) were too short). So, the stereo's at an angle, but it fits. More or less...
If anyone knows where I can get a proper one, please do let us know