My 2 cents..
The old days, we use to cut our OEM springs to achieve the drop stance.
Certain cars didn't get a lot of aftermarket support in those days.
Lowering springs are garbage, It was a cheap way to capitalize on coilover market.
There are aftermarket shock and strut assembly kits, that cater towards lowering springs.
That will give you OEM feel with a one way drop height. However, it is costly.
Most of your local franchise shock and strut shops will offer this set-up (kwsuspensions brand), if you are will to pay for it.
Keep-in-mind, that coilovers are not street legal and are recommended for track usage only. Some shops will not install them for you for legal purpose.
Coilovers sleeves are also a waste of money.
Don't waste anymore money on accessories for your Corolla.
I would recommend you to save up, research, and get set of entry-level coilovers.