Unity 3D - handle the legs and arms for the character

I have a game with the character shown in the picture. I need to recode so that the character's arms and legs can work elastically like in the video. My game is using Rope Obi but it doesn't seem to work well, you can redo it with another library if needed. I need to process it in short time. Since many people have accepted the project but have not done it, you should only bid if you are sure you can do it and give the exact cost to avoid wasting both parties' time. Thanks all !