All Ivar fans here. And what if it’s not supposed to be wood after all?
G**gle says Regal Fuchs - flexible like Ivar (I also find that the best solution) but made of aluminum with various accessories and many options... Whether it’s any good, I don’t know - but it looks well thought out at first glance.
Which really isn’t that cheap either... a 90cm segment then 105€ and unfortunately only 179cm high... hmm... I’ll keep looking a bit... if anything else comes your way...
I recommend a proper storage planning so that you know how many shelves you need at which intervals and where.
For example, one of my IVAR basement shelves has a compartment that is about 90 cm high. I keep beer and water crates there and can still take the bottles out above.
On the Ikea website under "Planner" and then "Storage" there is also the option to select an IVAR planner. You can at least use it for this planning. Whether it will be IVAR in the end can still be decided later.
What is the ceiling height of your basement? It makes sense to put storage boxes on the top level. In addition, the IVAR side panels are also available in the height of 226 cm. And for example, for the window side also in 124 cm height.