Thanks for the quick response Matthew. Do you know of any good add-ons, or is Cadimage the only game in town?

Matthew wrote:
The simplest thing is either to repeat the elements vertically or make multiple profiles with different numbers of cladding elements

or make a profile with as many repetitions you need, and use SEO to cut the unwanted part.
But yes, a custom GDL object, or a wall accessory would be the real solution.

Chris wrote:
Do you know of any good add-ons, or is Cadimage the only game in town?

Do a check to Cigraph's ArchiWall 2. Not sure, but maybe it can do what you need.

Another approach is using the CurtainWall with a custom panel.
The point is to define a scheme based on a single panel, very wide, so it can cover the whole distance. Set to zero the width of the frames, and define them "invisible".
These panels are automatically repeated to fit the CW height, but they are not trimmed. In the image below, you can see that the topmost one is stretched, while the "middletop" (to the right) is entirely there, not following the CW perimeter.