[Austin2297]

If this were mine, I would first be questioning the quality of ball joints that can be bought £12 each. My viewpoint is that when the DIY labour is free, you can ‘invest’ in quality parts, particularly when the job may not to too easy to do.
Ball joint splitter? Fork wedge or clamp type? It would depend on access for the preferred clamp type. If access is poor then the fork wedge may be better.

 

[Austin2297]

OE and OEM are much (mis)used terms, and my personal view is that I treat such terms with discretion. I used First Line products as far back as when I had hair, but haven’t done so for decades since. I have a freelance mechanic neighbour who treats them as a last-ditch-buy, based on too many jobs having to be re-done too soon after at his labour expense.
Of course, this opinion is open to challenge and other’s experiences. Incase it helps,I tend to buy such aftermarket products by Febi, and they have served me well.