Mtree, As far as I know, there are no Univega catalogs online. Search for the 1985 Miyata catalog ... it's dead easy. Because most, if not all, Univega frames were made by Miyata, the bikes often have the same or similar components. If you check the 1985 Miyatas v. the 1984 and 1986 Miyatas, you should be able to guess as to whether the components are original or close to original.
Good luck,
Tim