Do oversized airtite holders exist (50+ mm)?

I have an oversized 55mm medal that is currently in a flip, and I am interested in finding an airtite holder for it. Unfortunately, I am not having any success finding an airtite large enough to hold it.
Is anybody on the forum aware of a niche company that provides decent quality airtites for larger medals and exonumia?
Many thanks.
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In honor of the memory of Cpl. Michael E. Thompson
This is the 55mm german medal that needs a better holder.