Too bad for you. I have 4 of them, and none are the ones you want. Many years ago I bought an adapter that fit the press (J style) and allowed you to use new style shell holders. I'm sure I bought it from Lyman. Maybe you should try that.
I have a #2. #1 and #7 are there. The #12 seems to be no where.
The Lyman j > x conversion seems to be out of stock everywhere. I ordered what is supposed to be a "universal" j style shell holder for x style. It looks similar to the Lyman conversion. If it actually shows up, and works, we'll see