eva

I have just had my 350z imported from Japan and after it arrived i sent all my documents to DVLA for registration. Surprise surprise they lost my original document which i sent recorded delivery but they still cant find it. I have now tried to explain this to DVLA, but they are demanding i now need a dating letter from an enthusiast club. I have now had the car for 2 months and sadly have not been able to register it, can somebody please help and point in right direction as DVLA are being there usual selves. Kindest Regards Eva