im guessing you mean the 4door sapphire cosworth rather than the 3door original one?

if you want to build a 3door rep its much harder, as 3doors are not so common.
In this country the only ones you normally find apart from Cosworths are 1984-1985 sort of age 1.6L models.

if you want a sapphire (4door) rep its easy, any 4door model can be used.
2litre GLSi are ok, not too slow, cheap insurance, common, etc.

Lower 1.6 and 1.8 models are just as good as a base, just a bit slower.

Can get the 2000E model with leather etc, but are quite rare here, so even rarer in Malta no doubt.

Hope this helps