It might be hard to find a 8V XR2i without a cat in Germany. as they were so 'green' already back in 90's. Only one stupid mistake can be made, and that's to aquire a 16V zetec engined XR2i. If what you say about the total prohibitation of modifications of the car is true, then you would end up in trouble, as the engine mounts need little adjusting in order to fit with FRST transplanted.