I looked on New hollands Website.
They say burnt carmel dark fruit and raisin flavors...Special B, English Dark Crystal, or C120 are likely here.
They say rye..so maybe a couple pounds of rye.
It has more of a malty sweet flavor so Id lean toward Maris Otter for the base.
English Chocolate is an obvious choice for the chocolate notes and color.
Its atleast a start! Id try something like this(and I apologize I dont have a calculator in front of me for gravity and such.
Shoot for an OG around 1.065 or so
Maris Otter 10-12 lbs
Rye Malt- 2 lbs or so
Victory Malt- 2 lbs or so
Chocolate Malt-3/4 lbs
English Dark Crystal- 1/2 lbs.
Maybe London ESB or West Yorkshire yeast. I dont remember the hop character much and havent had the beer in a while to even take a stab at it.