Ball joint puller tool

[JHZR2]

Hello,

I've searched, but haven't seen a specific answer... If I want a puller tool to separate ball joints without using a pickle fork, what size puller do I need? 25mm? 27mm? This would be principally for my 82 300cd, which is the car getting worked on now... but tools that can be applied to the list of cars below would be wonderful... Not sure if that is possible or requires a collection of these puller devices...

Snap-on has free shipping below $500, so I may splurge if it means I can get this stuff done on a lot of cars...

Thanks!