welcome, ania. do you remember the vendor, or the year it might have been purchased, as well? these all give clues.
you might do a search on nga's data base under tall bearded, and limit the search by color, 'black'. this will give you a place to start. as you will soon see how many there are, and without more clues. it's quite a daunting task. it would be great to have one or two to choose from, but the numbers are many!
good luck in your search.
