Pillow/Pivot balls?

[Conrad]

Years ago on my Lazer ZXR the car had pillow/pivot balls instead of ball studs, these came in two different sizes, one for 2.6mm screws and one for 3mm. I need two pillow/pivot balls for 3mm screws.

I have plenty of 2.6mm balls and ends for the them but none of the 3mm, i cant remember if the 3.0mm balls fit in the same ends or did they have larger ends as well? Had a look on the usual retailer sites but not much luck unless someone can specify a kit that still uses them or has some spare. Thanks!