Magnavo Stereophonic Needle

I just got a new stereo this weekend at a local thrift store by my house. it is a Magnavox. I had room for another one, so I didn't have to get rid of the one I had, which is the 1963 Astro-Sonic. This is something a lot newer. This one is not an Astro-Sonic, and it plays 8-tracks. It sounds really good, I'm listening to it now and it sounds really, really good. The only thing is it needs a needle, JUST a needle, not a whole flip over cartridge which is the problem I was going through before. I saw a couple numbers on the back of the unit. Here is what I found.

Unit Number - BG6744MAO1
Serial Number - 14599791

I don't know if this will help anyone else. I don't see any information on the turntable, I'm not sure if it is a Micromatic or not. It's just labled Magnavox. And it plays three speeds, 78,45, 33. let me know if you know anyone who can help.