TRD pro coil over spring cracked

I was working on my truck & noticed on the drivers side coil spring that it has a crack near the spring perch it's the TRD pro bilstein set that I installed 3yrs ago I was wondering if these are still under warranty through TRD? I know these springs were manufactured by ebach but who do I address this issue to do I contact Toyota or ebach? Has anyone in here with the same setup come across this before if so what did you do to address this problem?

 

I would probably just call and check, 3 years is a long time but if they had issues with the metallurgy then they might replace them. Always replace both sides, never just one side.