Thanks, Platonides, for CCing here, even though it appears that the list is dead :(
Some more equivalences:
www.budva.cg.yu www.budva.rs spc.org.yu www.spc.rs www.oks.org.yu www.oks.org.rs www.kikinda.org.yu www.kikinda.rs www.ds.org.yu www.ds.org.rs www.nbs.yu www.nbs.rs www.serbia.sr.gov.yu www.srbija.gov.rs eunet.yu eunet.rs www.zastava-arms.co.yu www.zastava-arms.co.rs www.airportnis.co.yu www.airportnis.rs www.danas.co.yu www.danas.rs [Archive links don't seem to work]
Note that for the list I made, I have actually checked whether the site is otherwise the same and whether all the links to subpages will continue to work. I can't say if the same is true for these sites and what is the best thing to do where it isn't.
One more link, quite common on fr.wikipedia is www.belex.co.yu that should go to www.belex.rs . The links to subpages should continue to work.