The EL one will require a lot of work to get it to fit due to the difference in the boot profiles of EA/EB/ED vs EF/EL. The EBGT spoiler should be an easy fit, due to its mounting points matching the profile of the bootlid.
EFFalcon might be able to give you some pointers, as he's done similar but the other way around (fitting a spoiler that suits EA-ED bootlid to his EF). I don't think he uses these forums anymore, you can find him at www.fordforums.com.au
'91 EB Fairmont Ghia V8.
Pacemaker PH4000 extractors
Meaty semi-twin system
AUII XR8 t/b & maf, ELGT snorkel
BA semi-manual shifter conversion
Electronic shift kit
4.11 Hydratrak LSD
Explorer intake manifold
Contra 16x9 rims, rubber: 225(f)/245(r)
Chiptorque HP2 chip