There are many cartridges that "can fit", but what about the sound quality?
Maybe you can find Astatic FM100 or MF200 or Glanz MF31L in $200-300 category, none of the entry level Grado can compete with them. And the Moving Flux generator is unique (not the regular MM or MI). The Grado kicks ass when it comes to the top models like the signature XTZ by Joe Grado (my favorite). I have a few Grado branded "DJ200i" - they are actually a Grado Black, vintage Fidelity-Research FR-5E kills them.
The Audio-Technica AT120e is also good entry level cart and better than Grado entry level carts. The old Stanton 881 (and higher) and Pickering 3000 (and higher) with Nude Stereohedron styli are really good cartridges!