Check out Gotoh's GB528 and GB528S tuners.
I actually decided to use the Hipshot tuners, along with the redesigned headstock.
In other news, the remaining oak leaf onlays have shipped and should arrive in the coming week. I'm looking to buy a small table saw to cut the mahogany strips that will go between the neck and body sides. The Carvin neck comes with the lower portion of the neck flared outward toward the bottom.
The dotted lines is where I want to cut. At the headstock, I'll want to cut off the wings so I can add the mahogany as well. Looks like I'll have to add a bit of maple to the top, If I got the scale right.