Oria?
they made lot of steel tubesets (used fex by Bianchi, Moser, Coppi...), Italian brand as I remember They had also an alloy tubeset as I remember, so maybe that's the direction - some Italian brand?
They are all similar around the 1992 time. no doubt Oria 7020 was the tubing to use, probably the tubing used in the Orange Alu-O as it's the same look and doubt many would have been making it.