Hey dude, sorry this is days late. I have this problem in boots too. I'm a guy so I always have the option of buying womens boots, which can solve this problem. Women's boots tend to be more narrow. But some brands just make their male models in smaller sizes and pretty colours and call them womens. I recommend Burton's because they were the first to make a real girls boot that is narrow. My gf has Emeralds that I got for $130 and they are great. I personally went with Burton Grails, but I had to put in J pads and a Superfeet foot bed. J pads go in behind the liner around the ankle area to reduce lift. Burton has very good heel support, but also offers J pads with most of their boots. And even ones that don't have J pads included will have a velcro spot for them (at least on Burton). The shop attendent gave my the J pads for free with mine because Burton in their infinite wisdom decided to not include them on their $300+ boots.
Anyway dude, PM me if you want so detailed info on fitting boots, heat molding, J pads, Footbeds and whatever. You should take almost an hour fitting a boot for a non-standard foot. And you will likely have to try more than one (that might means hours of shopping =( ). You might have to give'r on down to West Virginia against for this. But hey, that should earn you that blowie.