Are There Custom Coil Spring Spacer/Seats?

[Mimosa]

I recently purchased a set of coilovers and the rear coil spring seats are too thin. The shop recommends getting a thicker set to have more height adjustability. Are there any companies out there that specialize in this? I've been searching for more than an hour now. I've seen some things, but I can quite find what I'm looking for.

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[Mimosa]

Found a place with a wide variety of sizes that are fabricated in polyurethane. Bad thing is some of them have a decent amount of lead time since the factory is in Australia.

https://superprousa.com/