Here is the link for the space saver spare I purchased at BimmerZone.
http://www.bimmerzone.com/BMW_Perfor...T-F10-KIT.html
I also bought a cover for the tire at bimmerzone, I would recommend tire felts so you have a flat surface for strapping it down and storing things on top of it.
I bought the jack and mobility kit at BMWPartsForLess.
http://www.bmwpartsforless.com/index...el-accessories
I switched to nonRFTs on my 2006 e60 550i and have switched to nonRFTs the minute I bought my 2011 550ix and again with my 2012 550ix. I also run nonRFT winter tires. I have Pilot PS2s for summer tires since the Pilot SS's weren't out yet. Better ride, quieter, better performance than an all season RFT.