I need a new k frame. 74 dart

so I was recently in an accident and messed my dart up :/. I need to replace the upper and lowers on both sides and just found that I also need a new k frame. I recently purchased the tubular upper and lowers from qa1 but their k frame says it’s only compatible with 67-72 Dodge darts. Anyone have any recommendations on where I can find one?

Out here in AZ I have seen a couple on the Phoenix craigslist, so maybe in your area as well.
I searched "Mopar" when I saw them.

Here's an example.
Mopar Parts 2