E70 N52 alternator nightmare

[blakdeth77]

I've been trying to replace the alternator on my wife's 2010 X5 E70 with the 3.0 N52k motor. The vehicle has 4 zone climate control (i think) but does not have adaptive drive. There are 4 separate temp controls in the cabin so to me that would say 4 zone... it's got 4 heated seats as well.

Anyway my problem is finding the correct alternator. Went to rock auto and they have many different choices. I got a Remy remanufactured unit (remy 12891) because it had the 6 groove pulley vs the 7 groove on the remy 12942. I looked at the photos again and it appears the 12942 has the fixed pulley bolt hole in the right place. But the wrong number of grooves in the pulley. It's like each one I try is wrong on their site... or their information is wrong about the 7 groove model. They're all 180A that I am seeing on the site.

I've had issues with the last three orders in a row from rock auto and I'm really not liking that they don't have *any* customer service whatsoever. The descriptions on the parts at rock auto are so vague and there's a multitude of choices for this damn thing it's like they don't give AF and want to make some extra dough from restock fees. Anyone know where to get the right alternator without paying near-dealer prices?

I attached a photo of the old and new side to side so you can see the difference in fixed pulley locations.
I'm getting desperate enough to just try the "7 pulley" model because I don't see anything wrong with having an extra groove as long as I line it up properly when I install it. lol
If I thought it were possible, I'd rebuild this one. But the oil filter housing gasket leaked all over the alternator and IDK if I can get it all cleaned out. The bearings are so shot I think I can move the pulley back and forth through the housing about 1/8". Anyway has anyone else seen the same problem? Am I mis-identifying this one as a 180A when it's a 230A?