Toilet chair/Commode hire?

Hi!
I am having a knee operation next week and have been told that my entire leg will be in plaster for between 8 to 10 weeks, maybe longer. Our bathroom is situated on the 1st floor which will make it impossible for me to reach, so I was wondering of anyone knows if you can hire a toilet chair/commode type thing here in Belgium?? I live in Ixelles, and I don't know what to do :( Thank you for your help.