I might be wrong about this but is it even possible to buy the IKEA carcasses without doors? I told myself that after trying to navigate the website with a vague idea of maybe getting some plykea in the future. I may well just have misunderstood.
Yes, you can get the IKEA carcasses without the doors. It's easier to figure it out if you can a paper copy of their catalogue rather than trying to navigate the website.
There has been quite a lot of mention of Plykea in this thread over a few years. You might not be ready for that level of hip though :)