In article ,
(MICHELLE H.) wrote:

http://www.swisco.com/images/pictures/2011/04/796.jpg

Your pictures are not worth 1000 words. Too small, unlabeled, etc. I
can't tell what's broken. This might be a thing where you need to modify
and adapt. Is the wheel detached, or is the piece that holds the wheel
broken into pieces? Fitting a new loose wheel (readily available) or
modifying a similar bracket to make it work in your situation are
options.