They updated their website now. You can order the Long Hunter lid as an option. But, there isn't a price discount. The price of the standard lid and adding the long hunter lid is the same price if you just bought the bag with the long hunter option.
I ordered them separately so I have the option of using the standard lid alone. EMR II in Coyote Brown (standard lid) with Long Hunter lid added as well. This will be replacing my AG2 bag for backpacking. Once I sell some other gear I will be placing an order for the Nomad for hunting!