I have channel rustic cedar plank siding running verticals that needs to be replaced, and I want to use Fiber cement to keep the woodpeckers from destroying the siding again. Only problem is that I hate the look of the vertical fiber cement panels. Is anyone aware of a manufacturer that makes fiber cement planks that can be installed vertically.

 

Nichiha Vintage Wood might be the closest thing to what you're looking for. It can be installed vertically, and comes in 10' lengths. I've installed a few Nichiha products but don't know much about this one.

Looks like the panels are 18" x 10' and the layout on the front is a 5 5/8" plank with a 3/8" groove... so basically 6" on center.

 

Boral makes some channel siding. It's not fiber cement, but uses fly ash and binders and has properties similar to fiber cement. I haven't used any of the siding, but have used some of the trim boards to replace cedar trim where carpenter bees and woodpeckers made a mess of the cedar. I can attest that neither of those pests likes it. It's easy to work with, kind of floppy like FC and heavy. Nails easily and doesn't split. Cuts don't need priming (although I did). Cuts with carbide saw blades but dulls them quickly. Lot of fine dust from cutting, like FC. It paints beautifully. Best thing for me....it can be painted dark colors and there is no issue of expansion/contraction like you get with PVC.

Not that crazy about the fly ash part, but given all the pluses, I decided I could live with it.