I'm guessing picking up decent mirrors from a scrapyard's out of the questions for ibiza's cos of the compatibility issue? My last car was a ford and there were shedloads of stuff you could pick up for it from scrapped cars for dirt cheap
 
Im guessing its the right one, outside electric mirror.

the description read,
Suitably for Seat Ibiza Cordoba 6K year of construction 08/99-02/02 black, with electric adjustment, reflecting glass convex, heatable, also for models with temperature sensor

do you think its the small stubby one ?
 
the mirror in the link is the small one

It says outer mirror for Germany, meaning passenger side (driver side for you guys)