don't think you can buy one, but worth investigating i guess. if so, price and fine print are the watchword.
I doubt you will be able to find anyone (stupid enough) willing to write a warranty that covers anything for a car with that many miles as parts wear out. This is why when people are past a certain age insurance companies won't write new life insurance policies. I'm not interested in getting a bunch of emails and phone calls so I didn't get any further but here is a place to start: Best Extended Auto Warranty Companies | ConsumerAffairs As long as you are researching pricing for the Prius also get a quote on your Buick. I would be very interested in your findings.
Got the VIN and checked the records on the Toyota Owners site... Covered the order number in case that's not supposed to be shared.