Really sorry to hear this. Can you find a good,used lump? Ring an expert to ascertain full costs of engine rebuild (Bennett's). Would they sell it on for you less their work? Keeps one OTR and you get more satisfaction than scrapping. Or break. I'd like first dibs on both OEM silver mirrors, please. Just mull your options over carefully with numbers (£) to substantiate your decision, plus your capability. Good luck, chap.