You're talking about an extended stile. Many semi custom lines have that, from mid grade on up. It's only with framed cabinetry lines though, not frameless.

Thank you so much. Do most semi custom lines have this available?

Many, but not most, have extended stiles available. It's much trickier for an installer to install with them instead of a filler, though, so you have to prequalify your installer. You need someone with a higher skill set, and he's usually a bit more money. Using an extended stile doesn't "eliminate" the need for a filler, it just gives you that filler attached to the box, without a seam. Using a filler for the proper clearances gives you the same result, just with a seam where the two join.

They key to using any of them for proper clearances is understanding the lines. Which takes a good KD. I hope you've found that person!