Hello, lenin.
The flags by Maverick listed in the WSS Austrian section are the ones you want (as I arranged for Stuart to make them
), and are as described by Dan Schorr and illustrated in the Robert Hall & GioanCarlo Boeri book on the Austrian Army published through the Pike & Shot Society.
There is also a very good Knoetel plate illustrating the grenadiers that should be easily found with a Google search.
Nic at Ebor has done several grenadier figures specially too, and they are listed in the Austrian Foot section, so you are all set!
Cheers, Rohan.