Is there a way to create relative links to an Indesign Template file?

Just like the title says, I'm trying to create relative paths to an illustrator file and excel file in my template file. I'm using data merge to create a bunch of files from the template and when I the individual InDesign files, I run a script that places each of the new documents into a folder with the same name. I am then dropping the linked files into the new folders and kept the files the same name and kept the same file structure. So, if it were a relative path, it would update. But, it shows up as a missing link. After I make the files, I am running a script to open the files, update links, and export a PDF; so, manually updating the links kinda defeats the purpose. 

If there's not a way to create a relative path, is there a script out there that will look for a file of the same file type and/or filename in the same folder as the document?

Thank you in advance!