Mauser rifle band spring question

[usmc0811]

Not sure of the type of Mauser I have but the rifle band spring is missing. A piece of it is still stuck in the stock. What type of spring do I need? I did an online search and there are all different kinds. Here are some pictures of my rifle if it helps.

 

[theotherwaldo]

Looks like A Dominican Republic Mauser, which were refurbed Mausers from Brazil.
Here's a set of images from Liberty Tree: https://www.libertytreecollectors.com/productcart/pc/viewPrd.asp?idproduct=7685