The pins and the plates are different.
To get yourself an ALPS keyboard with HHKB/Poker-like or Tenkeyless layout, it would be much easier to take a "full-sized" ALPS keyboard such as a Dell AT101W or some vintage Apple keyboard, cut off the pieces you don't need, add some wires to regain a full working matrix and then connect a custom controller to it.
I saw about a year ago, an Asian guy did just this with an Apple Extended Keyboard II and an Aikon controller.. I'll see if I can find the thread...