I tend to agree with those who have suggested that the scale is probably outsourced, thus no replacement parts on hand.
Many years ago, before they made (or at least before I knew they existed??) bushing type neck sizing dies, I traced the bullet concentricity problem I was having with my long range ammo back to pulling the expander ball out of case neck. I had retired a very old RCBS full length sizing die that was just plain worn out and scratched case necks badly. Called RCBS, explained to the tech that the die did not owe me anything but wondered if they could open up the neck to resize my (neck turned) brass without use of the expander. (I emphasized that I would be happy to pay for this custom work.)
They did not quote a price, but told me to send them two or three once fired cases and my old die and they would perform the task. It's been a long time, but to the best of my recollection, about ten days later a package arrived from RCBS containing my old (or maybe a new) die. There was no charge!
Have never had a reason to rely on RCBS customer service since, but that one issue solidified this customer's relationship w/RCBS.
Regards,
hm