Radio Buttons

Hi

Have got a series 1 Discovery with landrover installed CD Changer Controller, some of the buttons have now broken and it's becoming a pain in the butt to change channels or fast forward / search. The radio works fine and I don't want to change the whole thing for 2 small buttons. Anyone got any ideas wher to get any - apart from saying "Discovery" on the top right there are no makers details
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you need to take the radio out and on the casing there will be some sort of id number then you could try a dealer but i think you will struggle to get the 2 buttons, you may find a radio head unit the same as yours on ebay,