Help with Baritone Uke

Hi all I am currently working on my second uke, a Concert of Cherry and Purpleheart. That being said I have been working from plans.

I want to make a couple of Baritone Ukes for friends. I have a great source for Cocobole and want to use that... anyway I am looking for a good source for plans for a baritone. Or at least basic dimensions and scale length.

Also looking for a good source for spruce top material.

Thanks in advance.

I would say Hanalima.com for both. They have great Bari plans and building materials.