Cheapest and easiest is to cut your originals. Ran cut springs in cars for close to 14 years without issues (guess it doesn't make it right but it wasn't going to kill me) and either car was very competitive in motorsports.
Have a troll around any car wrecking yards with your standard spring in hand and look for something that is the same diameter but shorter. There a lots of cars in Europe that we have never seen so there's got to be one that will fit.
Another option is to reset your original springs to the height that you want. Take them to a spring maker and talk to the guy that actually does that work, not the person behind the counter. They will tell you what is possible and what is not.
Word of warning. don't go to low as you will completely stuff its handling. Think 2" should be absolute maximum in my opinion unless it is for show.