Car for Mom

Hi everyone, I'm not very good at asking for help but this isn't for me, it's for my mom. Two years ago my step dad left her and my little sister and never looked back. Shortly after he left my mom she was foreclosed on and I've been helping her all I can ever since. Ever since the foreclosure she moved into an apartment, she has a job she loves at a pharmacy, and has been doing pretty good. Unfortunately her car just died on her and it would of cost way more than it was worth to fix. Struggling as she already was this was quite a dilemma. Now we are trying to get her a new car so she can continue to get to work. Since she was foreclosed on and her credit wasn't that great to begin with we have a tight budget on the cars and even so the place that approved her wants 2,000 down. Her friend got her a weekend job at kohls so she can make her car payments we just need to get her fully approved. I've been doing everything I can to help make sure my sister always has food and a roof over her head but I currently do not have 2,000 I can give her right now. Any help would be incredibly appreciated and would mean a lot to her and me.