For KBB of your truck, you could get a Toyota Prius (45-50mpg) that is a few years old, a first generation Honda Insight (60-70mpg), an almost brand new Toyota Yaris two door hatch back.
If you could plug in at work you could even take that $9k and put a decent down payment down on a brand new Nissan Leaf, your commute is long enough that you would have to charge at work for sure, but you would be paying $.02-$.03 per mile instead of around $.14 per mile leaving you with about $300 extra in your pocket at the end of the month for car payment.
Power Search is a great tool for finding vehicles that fit your needs and get the gas mileage you want.