Dove acquistare le stampelle per l’avambraccio a Sofia?

I’m arrived into Sofia yesterday, but the airline staff damaged one of my crutches and I can’t use it. I thought I might be able to get by this week with just one, but I’m too unsteady on my feet. 

Is there anywhere that would sell a pair of forearm crutches in person? Alternatively, I might be able to use the working crutch I have left and a cane on the other side, if it’s easier to buy a cane. 

Any guidance would be greatly appreciated!!