So, my speedometer cable broke about a month ago. I have been searching everywhere for another one and I can't find anything about it. Everything shows speed sensors on searches? Anyone know where I could find one?

 

The cable might be available form Toyota. Enter your VIN into the vehicle search and see if the cable for your particular model is available: https://www.toyotapartsdeal.com/

I found a couple on eBay:
Here is a new OEM cable, but check with seller to see if this cable fits your 4Runner: https://www.ebay.com/itm/GENUINE-TOY...5XIjvb&vxp=mtr

Here is a new reproduction speedometer cable for 1990-1995 4Runners: https://www.ebay.com/itm/Toyota-Spee...ZZvBkp&vxp=mtr

These speedometer cables do run on the pricey side.

 

I bought one a few years ago from the dealership was $125