My power steering went out on me a few days ago. Before I replace it, are there any other things I should check out? Anything I should replace at the same time? Where's the best place to purchase a replacement pump?

Vehicle info:
2004 Ram 4 door 1/2 ton, 4x4 w/Hemi
Truck has 95,000 miles. Steering rack, ball joints, tie rod ends, and shocks were replaced in January.

 

You can get a pump at any local auto parts store. I would try AdvanceAuto online and google some discount codes to use at checkout. Then go pick it up from the store. You can save some coins that way. Might also be a good time to replace the PS fluid but remember it is ATF4