I know some Dubrow's items wound up on Ebay.
Apparently others were recycled into other restaurants. This comes from a 1988 article entitled "French bistros take all-American turn" by Joe Edwards.
"Like Restaurant Florent, the restaurant will be unpretentious and offer a good value, according to Morellet, who noted that dinner entrees would be priced from $7.75 to $13.50. But the decor is fancier--what Morellet called "high-style 1950s--a mix of contemporary and postmodern. Furniture includes the original cast aluminum chairs from the old Dubrow's Cafeteria, which closed several years ago."
(Nation's Restaurant News, Feb 8, 1988)