The short in question, Destino, was finally completed in 2003. It’s up on Youtube
“Dominiguez”?
Another film which had many expats from Spain working in it was Dumbo (released in 1941). Most of those guys aren’t very well known outside our borders, but the list includes several big names in the Spanish absurdist movement. The pink elephants scene is said to have been directly inspired by Dalí (although not so much that he was able to extract copyright).