In reply to Tom Beaumont:
Montrail used to make rock shoes (up until last year?) which had a good narrow fit. You heat them up in the oven for the first time and it helps moulding to your foot. I have Wassabi (green velcro) and they're perfect for narrower feet - though the velcro was piss and needed replacing. If you come across Montrail I'd recommend trying them. Or maybe trying womens fit boots? Apparently they're generally narrower.