1/4W resistors are plenty for LED applications.
The indicator lead that comes from the Fastrack switch is bipolar, so you just put the resistor in series with one lead of the LED and connect that combination across the indicator lead and ground. If the colors are reversed, reverse the two leads to the LED/resistor combo.
Here's switches at 59 cents each, close as I can come.
5 x Mini Momentary (On)Off(On) Toggle Switch Car Dash Dashboard Boat SPDT, eBay: 332818847338, $2.95 for five shipped.