Thanks for the link, Cattivo. I've checked on here
http://www.realoem.com/bmw/enUS/part...&q=13537585261 which then took me to eBay where I've found them for as little as $30 used. I just don't wanna spend $2000 and then they release Index 12. I'm not even sure this is my issue, but it seems to relate and the mpg gains might justify me doing it anyways.
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'10 BMW X5///M - Alpine White on Sakhir Orange - JB4 w/ HCP Stage 2 BEF, NGK 97506 @ .20, SS tubing & BMC filters, gutted cats, AC Forged 312 22's, H&R 2"
'98 BMW 740iL - ///E39 M5 6spd swap, fully built engine (sleeved, P&P, cams), 3.46 LSD, H&R Stage 2/Bilstein HD, Magnaflow 14816's
'97 BMW 328ci - ///E36 M3 clutch & L/W flywheel, Z4///M 18's