Changing out the front seal is the cheapest, easiest, and quickest thing you can do. NAPA has the seal, just take it in and they'll match it up.

You can puncture the seal with a pointed punch and they take an angled pick and pry it out. Easy.

Just take some emery cloth to the shaft to clean it up before you slide the new seal on, oil up the shaft and seal too. A piece of PVC can be used to tap the seal in place.

Scott