The flooring nailer we bought uses 2" L shaped flooring cleats. These are not so easy to find locally and I was hesitant to order them on-line because of the weight - shipping would likely eat up any savings.
Lowes didn't have them. National Home Center acted like I was an idiot (really they should get a handle on their poor customer service) and Sutherland's didn't have them. Our last stop was Home Depot and, voila! There they were. And the price was comparable to the ones on the web. I bought 4 boxes of cleats, a roll of 15 pound felt and a new pair of knee pads.