Vintage Dual stylus and or Cart replacement

I am trying to help a friend replace the stylus on a vintage console RCA turntable and not sure where to find a replacement stylus or cartridge.
The console is rca victor and the turntable is a dual
Also need to post a pic, but I don’t know how to do that but if that’s allowed here any help with the much appreciated

my first stop would be lpgear.com assuming you live in the US
Next would be turntableneedles.com Easier to actually speak with someone there.

I've bought from both. You will need to know about what year it was built and the console model number to get started. you may get lucky right off the bat or it may take a lot of digging.

Good luck.