Make a pool and narrow down the old alps kbs interested
Or make a new SP standard alps stabilizers and feed old kbs with just the not stabilized Keys
Don't try to do what can't be done
Focus 2001, AEK, AT101, omnikey, SIIG just to name a few have at least different enter key or space bar stabilizers, then there are the compatibles like monterey, kpt or Omron, then the "new" duckys, Filco zero, Leopold lite, matias.
I have a number of those old kbs, even an IBM 5954339, and wish but really don't think anyone can cover all those variances
Veteran Alps experts discussing Clones (Credits to Webit)