Need name of part that holds door open on 71 Scamp!

I found out that the part is called an S spring, but i cant seem to find anywhere that sells it seperatly....does anybody know where i can get this spring for the hinge seperatly? Also, if thats not an option is there any hinges off of newer vehicles that can interchange with my 71 scamps hinges? I was told something about 80's dakotas maybe working....

thanks
Matthew