A jaw crusher sized to deal with what you describe would be in the range of a 12 x 20 to 24. Sizing requirements for jaw crushers are commonly called out using the feed opening dimension first, then by the width dimension of the crushing cavity.

There have been several manufacturers of crushers in that size range. One of the more easily fitted was the Lippmann Engineering 12x24 capacity King model. It is no longer being made, though we still provide parts for the machines still in existence. The movable die is 28 long x 20 wide and is wedge held. The stationary is 24 long x 21.750” wide over-all, and is cheek plate held.

This is where I’m uncertain about understanding your question -- if you’re looking for a set of jaw dies that’ll fit you crusher, you’ll have to build the frame and pitman around what’s available (such as the dies for the Lippmann I described). Otherwise, you’ll be looking at considerable expense to make patterns for what you arrive at for your needed fitting dimensions.

To find something online, look at websites for OEM crusher manufacturers -- Metso, Pioneer-Kolberg, Lippmann or Cedarapids -- to see what size ranges of crushers they may be offering currently. They’ll likely not provide specific jaw die dimensional values in parts books. If you’re looking to build something around existing jaw dies, it’d be best to contact me direct to respond specifically to what your project requires.