Border Ornament used by Mark Argetsinger

[Parangon]

Hello guys,

I have been fanatically searching for this printing border for the last couple of days but to no avail.

It has been used by master typographer and book designer Mark Argetsinger (http://argetsingerbooks.com) on the following poster and bookplate :

 

I have browsed through numerous specimens (Monotype, Linotype, Ludlow, Curwen, etc.) but I cannot find it. Besides, I am pretty sure it has been digitised and included in a font but I cannot recall where I have seen it.

I would be most grateful if you could help me solve this enigma.

Thank you for your time.