Extended warranty for used cars

I am planning to buy a used Dodge Caravan 2013, 100,000 km. Asking price is $11000.
I am also looking to buy extended warranty for engine and transmission. Chrysler dealership is selling extended warranty for $2000 for 40,000km. Do I have other reliable options to choose from ? Which are those and whats the cost ? If I buy a vehicle which is run for 220,000 km, can I still get extended warranty for it ? Whats the highest mileage that a I can get extended warranty for ?

Thanks,
Jignesh