There's nothing difficult about it. You could do it now with any LHT. You need a disc fork, road-pull Avid BB7 brake and a disc front wheel, about $150-250.
The trick is finding a fork with approximately the same axle-to-crown length, and rake. For 26" wheel LHT, there's not a cheap one out there that fits exactly right (376mm atc). For 700c, there are a few forks @ ~395mm that will work and they're not too pricey.
If you wait for the dLHT, they'll probably sell these from QBP dealers in black for ~$100-120, for 26 and 700.