DIRTT Millwork on a LEED project

Anyone else use this on a project in lieu of tradional millwork fabricated by a local shop? The reason I ask is because we are in the final stages of trying to specify DIRTT millwork for a project and I asked if the product was available with NAUF substrates. The rep is saying since it is fully encapsulated in Thermafoil, that using traditional MDF is fine as the substrate will have no opportunity to off gas. While that may be true, I still have to provide a cut sheet of the substrate material and will not be compliant with this credit. They are saying that they can fabricated with a NAUF substrate with an upcharge, but they feel it is not necessary. Thoughts? Prior experience? Thanks.