Hi, many years ago I bought a single slotted wall storage system for our storage room from Ikea. As I would like to extend the storage space now, I was looking for the same or similar system as I like the flexibility of adjusting the shelf height when needed. Now Ikea does not produce or eat least sell this system in Singapore anymore. Can anyone advice where to find such parts - the single slotted poles as well as the shelf brackets - in Singapore? Below are pictures of the parts I'm looking for. Thanks a lot !