right now i cant find it to measure the nut..

but i'm sure my re-issue Danelectro 12 string has a wider than normal
fingerboard..
even for an electric 12 string..

not too difficult to find one of these at a reasonable price on ebay..

and just remove the 6 octave/double course strings..

the Danelectro Lipstick pickups are traditioally ideal for blues
and bottleneck playing.