They wont give you the sponsor's UCI, he/she needs to ask CIC for it and if you request by email the sponsor has to complete and send them a form stating he/she authorizes you to have that information from them. They will send you the form and where to send it in an email. This is what I had to do when I my husband requested my UCI and I requested his.
ACS said:Personally, I would hold up hope that what we have seen is them just getting going again. CIC is like a big huge wheel, takes awhile to get turning but once it does.....*hopefully*
They seem to really just be starting up with their processing again recently, so hopefully once they get into it again it will pick up speed and keep moving that way! *fingers crossed*