The part you guys are looking for is
51169230724 from 218i:
https://www.realoem.com/bmw/enUS/sho...diagId=51_8582. That's why it's not showing up for you when you select M2.
I believe that you're going to need other parts, as well. I don't even know if the e-brake boot will swap over - probably not, since it looks different. You'd have to eliminate the rear vents too, which I personally couldn't care less about. Somebody should attempt this and report back with a DIY that includes a list of parts needed
I also thought about an armrest delete. I deleted the armrest in my e46 m3 and it was the most useful "mod" I've done. Much more room for proper shifting, especially if you're tall and have long arms. Some people love armrests, but I can't stand them in a manual car.
The alternative is to go for the CS center console, but I'm sure it's ridiculously overpriced.