I am trying to replace my N14 R56's rear crankshaft seal (11117568264), but all my local suppliers sell it without the sleeve or positioning tool.
I've searched online and found that I would need a BMW Specialty part 11 9 601, but I haven't found it anywhere.

Anyone know where to find the tool?

 

Try rmeuropean.com or online suppliers. They should have it with the alignment part (the white part in the picture). Also check Pelicanparts.com for a DIY write up. They might done it without the special tools.