The 820 is a unique hinge and nearly impossible to find. I don't think parts from todays hinges are remotely close to it. The 820 hinge is turning into the holy grail of hinges. When it's out of stock, I'm afraid the only solution is to fill the 35mm hole with a wood plug and switch over to a modern hinge. You need a face mount hinge like my 820 Soft Close hinge, not an edge mount. The location of the new 35mm hole is critical. It's normally 2mm in from the edge of the door depending on the hinge manufacturer. My suggestion is to find a cabinet maker or very good handyman to fill and drill the holes for you.
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