Not sure if it's totally same, but I've seen this type of hinges at
Lowe's and Home Depot.
Often used on cabinets at kitchens, or retail stores behind the service
Christopher A. Young
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I have an old ikea glass cabinet with a hinge like this:
The ring with two screw holes broke but Ikea no longer carries this
and hence no longer has this part.
Many of these hinges look similar but are not exactly the same. Or some
hinges may not look the same but has the same ring to replace mine.
Any idea what type of local stores or national chain stores may carry