Thanks! I bought a 1-1/2" Soss hinge but the total clearance was 1/2" (only 1/4" from the door edge to the hinge edge). I'll ask Soss if the bigger size has more clearance. I need 1" total clearance.

I'm assuming you've tried a basic Google search for "pivot hinge" and "90 degrees"? https://www.grainger.com/category/hardware/door-hardware/hinges/pivot-hinges?attrs=Range+of+Motion%7C90+Degrees&filters=attrs If all else fails, consider installing some sort of stop. There are stops you can put on the hinge pins of the hinges themselves, and then you can adjust them to where you want them. If you don't want to risk that the adjustment would shift, you can buy bolts to put on there (one on each side of the hole and then tighten them toward one another) Hinge-pin door stops https://www.homedepot.com/p/Everbilt-Satin-Nickel-Hinge-Pin-Door-Stop-15586/202033981 

Any non standard item you're inserting into a mfg process will have impact. They may not see it again this year. Maybe a few new tools/bits, stopping and resetting the fabrication and assembly line for this, restarting for any adds (always). Many shops would just say "no" or "I can't" as you are certainly weeding out the common skills, tools and capabilities. The more I think about these the more labor I see by several trades, installers, painters, etc. This is similar to how government specified products or projects get expensive... they up specify, often at the suggestion of a manufacturer or special interest, until competition falls away and bids get expensive. Happens all the time in the defense industry, school & public housing, all govt construction.

Just did this to 24 cabinets doors. Its easy. Kreg conceiled hinge jig, clamps, drill. The concealed hinges come in different cabinets overlap. Measure how much door overlap cabinets now with exposed hinges doors still attached Mine was 1/2 inch so i got 1/2 inch softclosed conceal hinge.