No such thing as good and budget sorry

Gaz are listing a set of something at £327.22 which includes delivery
Fiesta Mk4 - 1.4/1.6S Suspension Kit. Years: 94-96
[GFR223B] They will lower -30mm. Never tried, never used so no idea.

That price is on www.raldes.co.uk but I would expect Cossymad to be able to get a bit more shaved off.

There adjustable coilover set is just under £200 more for info