Short rear shocks?

I'm currently running eibach lowering springs 30-35mm drop with new shocks all round.

1.3 driver.

It has lowered it a fair bit from standard and have had no issues.

I think it could go lower and have read that with lower springs with eg 60 mm drop I would need shortened rear shocks.

Thats fine but where do you get them?  Never seen any for sale.

I dont want coilovers before someone mentions them. I want a spine.

Ta

They may exist but ive never seen shortened shocks. I would suspect coilovers are your best choice, pretty sure only the cheap ones are spine breakers. Although the lower you go the stiffer you must get or things that shouldn't start coming into contact.