There's only one because they just got one installed recently, and probably wanted to see if one was enough before buying another. It's not like Drew is having trouble storing all the extra money they've got. The library is where they decided to put it. I believe the SGA got the machine installed, and as such, would be the people to go to to get it moved.
Also, have you ever tried to copy something at the library using the copy machines?
When do you need change in the UC? I'd think it'd be much less likely than the library anyway.