Other examples:
Safari specialist Ian Duncan winning Safari 1994 in works Toyota.
Mats Jonsson winning Sweden 1992 and 1993 with Toyota Sweden (only Sweden entered in '92, Sweden and RAC in '93)
Gianfranco Cunico winning Sanremo 1993 with Ford Italy (was only doing Italian championship)
Tony Fassina winning Sanremo 1979 with a semi works Lancia Stratos (was also doing only Italian championship)