Wills Calendar after 1919

[rickpat]

Greetings,

My great grandfather, Thomas MORRISON, and his brother William John, both died in 1919 and I imagine that their wills may not have been probated until 1920.  The PRONI Wills calendar on line search ends at 1919.
How would one locate wills that might have been probated in 1920?

Regards,

Richard Morrison
near Boston, MA USA