Just because it’s available on eBay doesn’t mean it’s replaceable
If none of the reputable retails are selling it individual then chances are it’s not designed to be replaced.
That doesn’t stop cowboys selling them and doing it.
I have a van with riveted in lower ball joints…..
The arms 250 quid.
The service manual states these are non replCable and are not designed to be removed .
Without fail there are people reporting they have replaced them using eBay specials pressed in with a 50t press and lots of heat.
Now as one of the main contact points holding your front wheel in place do you really trust something is supposed to a one time fit that been heated up to expand it and forced out and in potentially causing damage /stretching /deformation on the way in.
Equally I’m.not surprised a garage wouldn’t take on a job like that if it’s not designed to be replaced …….insurance minefield if it let’s go.