Early TF-727 driveshaft help needed!

I have the trunnion style mount as pictured on the left (clipped from a thread by BigBlockMopar), which got mashed during a driveshaft drop on the highway. The trans is a '64 push-button unit behind a 413.

I need to replace that flange, and am wondering if there's a replacement through Spicer or a way to adapt it to an open style U-joint to the trans with another flange, either stock or via Moog or the like. I want to keep everything the same length, as my new driveshaft was based off the measurements of the old one. Thanks!

Jonny