Multitracks needed for research project

Hey guys, I'm a music producer and mixing engineer from London, UK. I am currently in the process of completing my Masters degree and for my major project I am conducting a study on mixing sonic signatures. I am in need of multitracks/stems from independent artists that I can mix for my project portfolio. The tracks are only going to be used for research purposes and won't be published anywhere and in return the artist gets a free mix which they are welcome to use if they so wish.

I am specifically looking for Country, Country/Pop music to mix, as I am specialising in this genre here in the UK.

If anyone has any multitracks available other than what I have already found on this forum and would want to share them with me I would be forever grateful.

Thanks, Drea