The CP 545 uses standard thermal "receipt" paper. Make sure you put rolls in carefully or you may break off the roller tabs. Sometimes the paper is too big. just peel off the extra.
Always load with the shiny side out.
Phoenix Sports stocks thermal paper for CP 545, ALGE Watermarked paper for TIMY and paper for the Microgate RTPRO , etc. Even Seiko DPU414 paper.