Hmmm, I had no problem, once I realized what I was after. Ask him if he has a container behind the counter that holds washers, take a look in there - it's not something they keep out front.
Try asking someone else or a different store, he may not be aware.
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1997 3.2L V6 Rodeo
32" Yoko's, 16x8 MB Wheels, 2" lift, Brushguard, KC Fog's, Loadwarrior Rack
On it's way to 185k strong