this is where is got it from a while back.
http://rapidshare.com/files/44874437/GetSPC.zip.html
After downloading it. Make a folder on your PC Called GETSPC. unzip the file GetSPC.zip into it. copy the folder to your microSD card. the go to "settings/system/device info" on your Touch, find your ESN and write it down(Case Sensitive). Run GetSPC.exe from you storage Card. put your ESN# in the INPUT field. Press go. the Output is your MSL Code.