If I understand correctly the dealer doesn't sell the springs, only the whole valve body? If that is the case, does anyone sell a kit with all of them or have them available? I would rather just take it apart once and replace everything that might need replacing even if it was a couple hundred dollars, because transmission fluid is expensive too, and I don't really have a convenient place to leave it with the transmission taken apart for a week or two while I order parts.

Has anyone else had issues like this and actually gotten the car driveable again? I can't find too much about it, most information online is either from when the cars were newer and the dealer just swapped the transmission under warranty, or people never really seem to come back and report that whatever they did worked.