First thing I'd do is de-chrome the grill, either black or colour code it to the car.
Then lower it with a decent set of springs & dampers or you could take it to Gaz & get them to make up a set of coilovers for you.
if body kts are your thing I suppose if you squint it does look kinda civic shaped so maybe you could persuade a body shop to modify a body kit for you.
There is stuff out there but you'll need to look abroad, the Lanos is sold as the FSO Lanos in Poland & the Polish love tuning their cars as much as us so, it might be worth a look.
Found an Aussie site selling some bits:
http://www.gtautostyle.com.au/daewoo/daewoo_lanos.php