I have a brand new set of Magnecore leads in the boot of my car, haven't got around to fitting them yet.
The diameter is slightly larger than the standard ones which means they probably won't fit the lead spacers.
You're welcome to borrow them if you're prepared to fit and remove them or replace them. I won't get a chance to drop into SSS this week, but you can drop in and pick them up if you're near Smithfield or my place.