Rega felt mat is warped, what to do?

I noticed that the mat for my Rega planar 2 is not laying flat on the platter. I would like to invest in a new non felt mat. There are a few out there like Ringmat$$$ musical fidelity$$ and one that I am not to sure about Torqmat. I hope that someone out there has had experience with these products, and if you could help I would greatly appreciate it.