Barry,
Neck is similar to a standard Martin Style baritone in shape and feel other than wider.
Here are some dimensions that may help.
Nut width 1.79" ( basically acoustic guitar width )
Body Joint Width 2.193"
Heel Height ( not including cap, or fret board ) 2.54"
Peghead length 5.5" to the front side of the Nut ( towards sound hole )
Didn't have an angle gauge but peghead appears to be at about 12 degrees negative to fret board plane.
Top of peghead to body joint is approximately 15.25"
Scale appears to be 20.125" or some where close.
Neck joins at the 12th fret
This should be enough to make your own template and design your own neck.
Blessings,
Kevin
