I called them several times to get some but they seemed less than interested in making anymore. I even asked if I could buy the cad file and they didn't have one saying someone else makes them for them.
We decided to make our own for the HO52/72 axle.
I'm not sure ours will work on a early 14 bolt but the housing end looks the same on the HO axles. I suspect it will need a different rotor than we use.
Take a look at this and see if your interested in working with me to make a kit for the swap.
This is for the HO axle with slide on drums
https://www.hollisterroad.com/HO5272Eaton.php