No central locking
Mine doesn't have aircon either - so we're both owned!

Just find replacement bumper bars - body kits are ugly.
If you can, find a EF9 front and rear bumper (Google images for reference)
You can notice the difference in bumpers as the ED has rectangular blinkers at the front and the EF's bumper lights wrap around the front bumper. If you manage to find one of those at a wreckers, you've got major win!

My power windows are slow as ****.. But they're still power and go all the way up! *Ner ner! :P*

And as for speaker wiring.. Mine was the same. I bet if you pull out your centre console, you'll find the same deal. Electrical tape every-****ing-where!