Barker or Scherr's? Not sure if their lead times are much better, though.

Check what you need. I've heard that only some size cabinets are hard to get.

Sometimes Ikea has the boxes but the doors are a wait . You can also check different Ikea stores too. If you have designed Ikea before you should be able to work with what is available in the boxes and then design around that . IMO Ikea is still the best for the money .

Ok, so I botched this - I was able to resize some and find items IKEA had in stock - didn't order fast enough - now out of stock again!