Only target for Windows that I can think of is StarWind from
www.rocketdivision.com; you can't buy the MS target since it is only sold through OEMs for MS Storage Server.
Expand storage by adding MSA30/Smart Array 6402 (you could use a SA642 but 6402 is better performance). MSA50/P600 also supported if you have the SAS model DL385G1 (I've never seen one of them, the SCSI model was very popular though)