This beautiful piece of artwork was done by velocirabbits on Tumblr. Unfortunately she doesn't have a Weasyl account (or a FA account), just tumblr as far as I know.
When I commission people, I like to give them free reign to draw what they think is fitting, or what they would enjoy. Little did she know how fitting this depiction of Flak really is! Not only have I been surrounded by militaria my entire life, but Flak really is a war hero, battling against my mental disorders with me.
Velocirabbits is currently open for commissions, and portraits like this are only $50! I highly recommend her, she was a pleasure working with and the turnaround was only 24 hours, she was READY TO GO.