There is a list of RGRE stories outside of FIM. It is called WiP Story Archives: https://docs.google.com/spreadsheets/d/1XiJRe1NWl_kIoWsHssZ27BMV7bZAe1jgX59-dWggYkA/edit#gid=0

I have recently added two stories from SadNonny: Beauty and the Blob and A Wallflower Grows.

It is not my site, I am just trying to update it when I can.