Searching for a wheelchair in order to vote.

I am looking for a wheelchair so I can vote (South Austin). I’m able to stand and walk for very a short amount of time but get dizzy, faint and have increased pain. I fell in May and have had major complications as a result. If I am going to have any chance of voting, I will need a wheelchair. Does anyone know where you can borrow one just to vote or a program the city may offer to assist people who want to vote but need a wheelchair? Thanks!