Hickey, £250 to repairs ABS!!!!! save your money, I have just bought some ABS rings off
(£1.99, yes that is right £1.99 per ring). If you are a bit handy and have a vice, remove the drive shaft with the damaged ring (not done mine yet, but there is not a lot to take off, whether its N/S or O/S, remove the ring from the outer CV joint (chisel is what I would use) and once heated with a blow lamp or similar, slip the new ring into place and allow to cool, refit the shaft, job done!
Re the engine/gearbox mount, I think Clios do suffer from this, again if you are handy with a spanner, its an easy job