Having one screw made can cost more than having 50 made.
Youre not just paying for a gram of metal.
Youre paying for the set up of the machine that makes the screw.
The screw doesnt cost much, but to have to take the machine out of the common setting and put propriotary fittings on it to make only one or two screws is alot of work to do for a small thing.
Its kind of like replacing a $5 part in a car, but you have to remove the engine to get to it.
The labor costs alot because in order to replace that $5 part, a days worth of labor to remove and replace the engine takes place.
Nobody will do that for only $10, ($5 for the part,, $5 labor).
Yes the situation stinks, but thats how it is, and Ray shouldnt have to eat the $18 because you lost your screw.
Thats why DIY amps are cheaper than Boutique amps.
Hammond cases are common and less expensive than custom extruded ones.