Any of the commonly available connectors with 0.1" (2.54mm) spacing will be off. For the center 46 pins, it doesn't matter too much. Once you get to the ends of the full length connector, the spacing will be noticeably off.
The Wonderco (Centronic) 46 pin connector listed on eBay will work but the spacing will be off. My adapter uses the 46 pin connector and I cut an extra connector to add the end section. I tried to shift the end section more into alignment when attaching it to the adapter.
The SNES Game Genie has a proper spaced 46 pin connector. The Retron 3 has a proper spaced full length connector. The later SNES consoles have thru-hole cart connectors - they're the ones with the black plastic mounting tabs on the end.