Kristina:  I do not have a walker, but have you checked with your local Elks
Club?

When I was a child, I had a bilateral-derotation done through the county
clinic. The operation was no-cost because we were well below poverty level at
that time.  Although the county clinic did the operation, they did NOT
provide a wheel chair or walker which I needed after the casts came off.  My
mother went to our local Elks Club.

The Elks is not just a social club.  They also are devoted to disabled
children, and primarily help those with cerebral palsy.  The Elks club
obtained a walker and wheel chair for me.  When I was done, we returned them.
 Check your phone book for the local Elks chapter and see if they might be
able to help you out.
Good Luck! -Denise.