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There is a reason everyone is tight lipped about this system, these also happen to be the blanks used for the older hotel security bypass cylinders on the guest room doors.
The Kaba ILCO hotel locks use these cylinders. And the VingCard 2100 series or the VingCard 1050 series hotel locks.

If you want the blanks you can get them from Accu-Lock (888) 473-8811 or 1-866-222-8562
https://acculock.com/
http://shopacculock.com/index.php?route ... uct_id=572

There are four key blanks available at Acculock - (1050 - 1050X - 1070 - 1070X) X denotes the reverse mirror keyway of the original blank.
Blanks from Acculock for these systems are $6.00 each, not cheap.
Acculock parts:
AL2100KB (1070)
AL2100KB-X (1070X)
AL1050KB
AL1050KB-X

Key Blank catalog numbers.
ILCO (TO7)
Trio
TO1 - TO2 - TO3 - TO4 - TO5 - TO6 - TO7 (ILCO & DOMINION NUMBERS)

VingCard and TrioVing both use the same cuts and spacing.
See attached PDF for details.
They are one and the same manufacturer.

If/when you order these blanks just tell them you dont want them cut, you only want the blanks.
No explanations required. Then you wont need to provide system numbers etc...
Patent on this system ran out years ago so the key blanks are public domain.
Just like the Medeco 00 keyway is also public domain and has been for years as well.

My first post attachment for spacing was in Metric (mm), this attached image is the standard Imperial or Inch based spacings and cuts.