They do have matte/1.0 gain screens (I imagine there are probably some people here that have one...). I don't know how common they are anymore with the Greyhawk being so close in gain, but it shouldn't cost you any more than their other screens (custom order or not). I believe they can probably custom spray any gain you want (but there may be a cost associated with that). Anyways, I'm pretty sure they list a 1.0 gain surface as a standard product, check their website. www.stewartfilm.com
Regards,
Kam Fung
Regards,
Kam Fung