Need help figuring out how to replace brakes

okay so my front brakes arent fully installed, im missing the 2nd brake pad and the hose is disconnected and cable is frayed (obvi) and my back brakes are mostly fine, i just need to realign and clean them off. My problem is I can't seem to find the exact model of brake pads that are already installed on my bike (tektro 520.12r, that is) is there any alternative I could easily install in place of that?