i know you shouldnt mix tires especially on rwd, but i am in need of new rear tires and am not spending the money on re01r's again so was wondering if the dunlop's would be close enough in comparison with the re01r's to make work.

 

I would say you are going to be much better off with matching the tires front and rear. They are similar tires but you can end up with unpredictable handling at the limits.
If I can help with the tires let me know.