Looking for MICHELIN TYRES - for FORD car?

i am looking to buy a pair of michelin tyrs for my mercury sable
12yr old car
is ther a place where i can find best deals.
i am looking for a basic mode. With 45k miles warranty
pleae advse.
the one i have now has got some nails and worn tread causing vibration.is there anyway i can fix this or going for a new ones are the only option
these are for my rear wheels

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