Go to Google and enter: "car rental near Disneyland". Its a great way to find anything nearby. Thinking about a grocery store? Try "Supermarket near Disneyland". Want to be specific? Try "Walmart near Disneyland".
I found the best rates for our time frame to be with Dollar at the Anaheim Plaza hotel. They are located on Harbor just across the street from the parks, and if you aren't staying in a hotel right next to them, they will pick you up at your hotel if you make arrangements in advance (as long as you're in the general area).
We have also rented from Alamo in DTD and Alamo on Katella in the past. Their rates are just higher this time so we're going to try out Dollar.
Thanks everyone!! We are flying in and taking a shuttle to Paradise Pier. We will need a car for only 2 days to do some sight seeing. I wasnt sure if i could get one nearby or not!! I am so excited to learn that we can!!! thanks again!
There's also a National and Alamo site on Katella, right next to Alpine Inn. We returned our car there while staying at PPH, and it was very convenient, since they had a shuttle to take DH back to PPH.