Purchase an Inogen portable oxygen concentrator

I am asking for help to purchase an Inogen portable oxygen concentrator for my elderly mom. She has COPD & Emphysema. She doesn't leave the house because she needs her oxygen. She misses all the holidays and family get- togethers. Insurance won't help pay for it, so I thought I could ask for help to purchase her one. Any amount of donation would be deeply appreciated. Thank you!