Had to find affordable rear springs for my Sportcombi and with a bit of luck and a lot of looking, I found the cross referenced part Lesjfors 4277822 for the Cadillac BLS estate and they were a perfect fit for my 9-3 Sportcombi with the dealer added towing package.

I also found the GH 223613 which affordably replaces the standard suspension rear coils on the sedan and a couple dozen other OEM car part numbers.