[Jeekinz]

I stopped reading at the 50% comments.

You can buy replacement filler pieces from the manufacturer to match. Buy a piece, hire a cabinet guy to install it. Been there, done that.
Where it gets hard is with older or no-name cabinets. There's 1500 shades of white, been there, done that too.

 

[Jeekinz]

The cabinet guy sucks if he cant fix that without tearing apart the kitchen. I've finished "cabinet installers" installs, the hardest part is the fillers, transitions, moulding, etc. Any monkey can hang cabinets.