I went ahead and ordered a complete tool kit from a company that make them in Sheffield for £100. Stainless steel too.
https://www.i6automotive.co.uk/workshop-tools/porsche-ims-bearing-removal-puller-tool.html
I figure I can sell it afterwards and get most of the money back.
Cover will be off soon so I can have a look at the bearing and make a decision. If it's firm and solid I'll pul the outer seal off, if it's wobbly at all I'll replace it, LN or EPS , I haven't decided yet.