You might try Two Friends Redwood (Greg and Craig got together awhile back and produced some nice mixtures together under that name) Redwood is actually a similar composition to Haddo's Delight, sans Rum and the process which creates Haddo's. It has a very woodsy aroma when burned, and tastes decidedly chocolaty to me. It is probably a good match for Haddo's in the vitamin 'N' department. While not exactly Haddo's Delight, it may be Haddo's little brother.
I reviewed it on TR some years ago
Redwood
It lists at $8.59/2 ounces at SP and used to be offered in bulk there.
Mars lists it at $25.70/8 ounces
Not much of a relief in the pocket, but it's the closest thing I've even found to Haddo's Delight, and it's not really a dead ringer, just a very satisfying alternative.