Where to buy drum brakes kit

I just ordered all the stuff from Rock also. I always check prices between Rock, O Reilly etc. and compare. Just ordered shocks from Rock. Same part number was twice as high at O Reilly as with shipping with Rock. Not always the case.'
Wonder how many billions the O Reilly family needs?
Then this AM I stood in inline at O Reilly 20 minutes to get 3 ft of fuel line hose. 2 counter guys, on eon the phone, and retarded customers ahead of me! lol But. I ain't complaining!!!!!!