Cia
I have contacted my keen rose growing friends in South Africa and the Netherlands and there a number of rare 'Oscar' roses. They will take some hunting down if you decide on a rose (I always would) so here goes -
Oskar Kordel (Oskar Cordel), Hybrid Perpetual, medium to deep pink, breed 1897 by Lambert. it's only available by two nurseries world wide: Chill Out Roses in Chugiak, USA and Hortico in Canada
Oskar Scheerer (Orscar Scheerer), Shrub Rose, dark red, breed by Kordes in 1961, available at 4 nurseries world wide: Les Roses Anciennes de Andre Eve, France; Pepinieres Loubert, France; Pepinieres Prayssacoises, France; La Rosarie Du Berry, France
Oscar Chauvry, Noisiette, medium pink breed 1900 by Chauvry is available only from: La Rosarie du Desert, France