So the normal auto parts stores don't carry any speedometer cable for EF chassis or DA. This is the 2nd one that's broken on my car and I need a replacement. Has anyone had luck with a replacement part? Or is it a junkyard only item.

 

I bought one from the dealer not too long ago

 

Part # (assuming MT) is 78410-SH3-A02 for the CRX

There are a few on ebay, best of luck.

 

Why is it breaking? Check that it's greased inside (remove, clean, grease, reinsert) and also check your ground wires. Bad grounds can cause heavy current in the speedo cable, overheating and binding.