You can buy a replacement https://www.amazon.com/dp/B0899ZF9QW/
A PEI sheet (better, but prints may stick even stronger) https://www.amazon.com/dp/B08L39BFVJ/
Or a glass bed (not magnetic) https://www.amazon.com/dp/B08CXLLCH4/
I don't know if any of the links are good or counterfeit...
This is just my experience, but I had first layer adhesion problems when trying to level to a 0.1mm with a piece of paper or even with feeler gauges, at least when using the Creality Ender flexible magnetic base. I ended up going with a 0.06mm feeler gauge instead.