Hostel Shoppe sells Vuelta rings that go up to 60 or 62 IIRC.

And at the same seller--there is a couple others from single recumbent companies that are 72t and 80t I think.
Some company made a recumbent trike once that used 305mm wheels, but was intended as a "racing" trike and was geared pretty tall.
...
These trikes didn't use a front derailleur, do note. They were either compound-geared or just 1x8 or whatever.