As far as form factor goes there are 1/2" Mount and P-Mount. That's it. P-Mount cartridges come with a half inch adapter. So, you can buy any cartridge and it will fit. What's most important is correct alignment. There are two ways to assure this is correct. Many TT's when new have a stylus overhang gauge. These tend to get lost and very few used ones still have them. The alternative is to use a stylus protractor for cartridge alignment. They are available free on this site. Look for "Tools" right below the page header.
gg383 gave you some good suggestions for a cartridge.
ARC SP9, HW19, RB300, Sumiko Blackbird front: Acoustat Spectra 22, 2 x 12" TL subs 2 bridged Crown XLS 402, 2 modified Dyna MK-III's. Behringer CX2310, DSP1124P, rear: Acoustat Model 1/SPW-1, Paradigm X-30, 2 Adcom GFA-545