For a second Ryuken 9 I simply used Asuka. I've put and extra leg from a Lunokhod that I have (due to a mispack) to have her stand on it and she looks as if she's running and turning to fire. Looks good and fits the theme + I've got a motorcycle marker now :]
I love that the Ryuken-9 SMG has become a focal point for amazing conversions. It's a great hallmark for a great profile.