Question about splinting ducks leg, how will she sleep, and sit?

[Angela duck mom]

I also have a lame duck, Feng Mian she is a Peaking. I have spent 2,000 in vet bills and can't spend anymore. Her knees are swollen and nothing the vet gave her helped much. I have been putting Bee-Calm and a steroid cream on twice a day that were mine and she has less swelling now and started walking a little but using her wings for support. Can I make or buy knee braces to help support?