IKEA can be repaired by any competent cabinet maker. IKEA doesn't use anything fancy and weird, all their stuff is standard or a slightly variation of standard and could easily be replaced by a standard one. In fact most of the IKEA stuff is so popular it has become standard.

IKEA sells both particleboard & veneer for their cheap/budget friendly stuff and hard pine/other wood for more expensive stuff.

You can't have cheap and solid wood, it's just too expensive.

Go down to the local wood shop and buy all the wood you need to make a sideboard and tell me how much it will cost. Certainly will be leagues higher then buying a particleboard & veneer version of the same thing.