Just from googling, the only ones I could find are SPSU which you mentioned, California State University-Chico, Lawrence Tech, Vaughn, and a joint program between UNC-Ashville and NCSU. I have not heard of many of these schools, so I can't attest to the quality of the programs.
The vast majority of the people I know who do work in the fields that someone with a mechatronics degree would study do not have a mechatronics degree but are Mechanical or Electrical engineers, so do not feel limited by only schools that offer a mechatronics bachelors. Good Luck.