You should take a look at my neck in FTC (Factor To Customer), jags. It has a combination of Ebony, Mahagony, Maple, Purpleheart, and Vermillion.
I was charged extra for the Vermillion and Mahagony. My understanding -but I'm NOT sure of this, so confirm- is that you can swap Vermillion neck laminates for purpleheart laminates. If this is true, you can go to the Custom Quote Generator on the main page to get an idea of that option. Pick a model that D0ESN'T have Purpleheart neck lams as an option, and then add an amount of Purpleheart lams and update the price.
I was charged several hundred extra for the Mahogany laminates, but I don't want to share that just because my interpretation of conversations with Valentino and others indicates that using Mahogany (and actually Vermillion, too) are NOT woods that they commonly use for neck laminates, and that price may differ greatly depending on availability, size, length, and possibly other factors. So I don't want to share that info as a frame of reference because what it might cost you now for want you have in mind might be more (or less).
But they cost more.
They look really nice, though, and by all accounts really give a wonderful warmth and richness to the sound.
I'm confident the extra $ I paid for the Mahogany and the Vermillion -and (ouch!) the EBONY will be worth it.
Bassed on what you've described, I think you'll really dig my neck.