Go to the auto parts store and get one. Buy Stant. You'll spen 1/3 the money, and get exactly the same thermostat. Ask for the 180 that fits the stock 195 dimensions. The guy needs to know how to read the book and cross-reference to the lower temp.
You need a 10mm socket and ratchet, as well as something to clean off the fiber gasket from the water outlet and lower intake, without scratching either, or getting all that crud into the intake (stuff a rag in before scraping).
Make sure you get the fiber water outlet gasket, and the rubber seal for the thermostat.