EDIT - Ugh, had a question about finding short throw shifters because I couldn't find any and the moment I post this I search again and find that UUC has one that fits. I swear I checked before and they didn't list anything...
EDIT2 - Turns out UUC's page has no option to search for products for the E89, but if you browse by item instead you can find a shifter for the Z435i. So I wasn't entirely dumb.