I believe that I might of picked up the last 190E 2.6 Eibach kit around (from Bekkers) when I called Eibach they informed me that all stock had been sold, so I started calling around and got lucky with my last phone call.
I noticed that at
www.carparts.com they have the Eibach springs listed for the 2.6, not sure if they are in stock but you could try them.
If you can not come up with the springs, Intrax makes them for the 190E 2.6, so you could either get those or the sportline springs.