Technics Turntable question

Hi Folks,
I have Technics SL-D202 turntable circa 1979 that I got from original owner. It currently has some model Empire cartridge which I suspect should be replaced due to heavy use. My question is since I know little about turntables. What model/brand cartridge could I replace this with and where can I purchase this. I don't want to spend more than $100. Thanks for your help!