gotcha

The EIBACH website you posted is chaotic but if you look closer, they offer actually only 2 sets of springs for 147.

These are NOT springs, only additional indicators to be put on the bumper. This is because of EU regulation, if you drop 147, the indicators get below the law limit and you have to install additional ones. But nobody controls this except German MOT.
Alfa-Romeo 147 (937) Eibach Pro Kit - Eibach Springs Online

Springs for 1,6 and 2,0
Alfa-Romeo 147 (937) Eibach Pro Kit - Eibach Springs Online

Springs for JTD and GTA (are these the same? according to Eibach, yes)
Alfa-Romeo 147 (937) Eibach Pro Kit - Eibach Springs Online

Springs for 1,6 and 2,0 including the indicators as a set
Alfa-Romeo 147 (937) Eibach Pro Kit - Eibach Springs Online

Springs for JTD including the indicators as a set
Alfa-Romeo 147 (937) Eibach Pro Kit - Eibach Springs Online


BTW, what you think about koni FSD dampers?

147 1.6TS (2002) Nerro, Beige Interior, 17" OZ Ultraleggera wheels + Potenza RE050, Billstein B8 dampers + H&R -35mm springs, Galfer Extreme Brake kit, ECU remap, Variable intake manifold, Custom made stainless steel exhaust manifold, 100cell racing cat, straight SS center section with resonator, Supersprint back-box, GTA spoiler, Lester GTA side skirts, GTA/Ti headlights, Blaupunkt Los Angeles MP74 + Focal Polyglass 165V2 (front) + MacAudio DVD 2.16 (rear) + Dynamat + custom fit HERZ subwoofer