Here's a TRUE story. "In the eighties" I worked for a HUGE local parts store. It fronted an entire city block, auto, light truck parts, popular parts for big rigs (mostly logging) chokers, rigging wire rope and chain, industrial janitorial, hydraulic hoses, and we turned drums and rotors....all the way from Fiats to the log truck drums. And we relined the big truck shoes. That's only a part of it. sold and repaired Miller welders and supplies, and the boss started the towns first "fastener" store not long after I started there.
There was a big tall, nice lanky guy who DROVE a Model AA truck, flatbed. he USED it, hauled lumber, etc. "Old Nick" had been there since year no2, 1931 is when they started.
One of the guys had showed me "this box" when I first started there, "down there" in the dust.
So this guy comes in, "Howdy Nick, how ya doin, say........I don't spose you can get me a ring and pinion fer my ol' model A?"
Nick says "we might have that in stock."
So he goes back, gets this old orange and black Timken box with the ring /pinion, dusts it off and takes it up front and dumps it on the counter.
"Oh yeah, we STOCK those."