I've never heard of this being done. I put new/genuine EB mirrors on mine which look quite similar and suit the car better than the EA ones (which I'm pretty sure were derived from the XF). With a little drilling and re-wiring, EF/EL ones will also fit, but I thought they looked out of place personally.
Jack Travis, E-Series Acting President
1989 Ford Fairmont Ghia turbo/GL replica (underway)
1994 Eunos 800M
1990 Ford Laser S