Found these hinge spacers:
181.6130 SPACER FOR CLIP /MODUL PLATES 3MM in Base Plates: Clip on
3mm Nylon hinge plate spacer blanks.
Put these underneath the hinge plate, against the cabinet wall, and they push the door 3mm more toward the center line. Only in dark brown.
These spacers on each side of the cabinet closed a 1/4" gap between the doors to about 1/16"
- the little white "Expando dowels" can also be had, separately, from a different supplier: Expando Dowel - Hinges - Blum - Cabinet Makers Supply
Of course, neither supplier sells BOTH parts. Hah! That would be too easy.
Now all my new IKEA doors on the old 80's cabinet boxes are lookin' good without that gaposis in the middle.