This of course doesn't apply to all programs, but for my program in particular clothing is handled by the program's official MSU club, Mechatronics Society.
This could be the case for your program as well. Medical Radiation Science does have their own club, which is the Medical Radiation Sciences Student Society. You can find contact info by going here: http://www.msumcmaster.ca/newmsu/clubs.htm
and searching for the club.