My DD has really flat feet, and is a bit bow legged. It was causing balance issues, and she was falling and tripping over all the time. She also couldn't balance very well. I ended up taking her to my orthotist who also does kids (turns out she has this wierd tendon problem causing it), because I have flat feet, and he gave us off the shelf orthotics (which he customised for us in that 1 foot was a lot worse a needed a bigger angle the other). He said if I go down the paed physio route (which I did for my son for tight calves & toe walking), then I will end up spending a lot, when you can't really 'fix' the issue (and they only recommend surgery if the patient is in extreme pain and can't walk which doesn't apply here), where as the simple physics of using an orthotic to change the angle that she walks at has really solves the problem. Of course it is only solved when she is wearing them obviously, but it has been 2 months now and I've seen a 95% improvement (she also has muscle tone issues from something else which I think accounts for the other 5%). You could try looking for a orthotist just for a cvonsult in the mean time?