If you just want a big, round headlight, it's pretty easy since you have a 1G B12S. Get a headlight & bucket from a naked bike, like the SV650, GS500, etc. and a set of headlight brackets for 43mm forks either from the aftermarket, or a bike with 43mm forks that comes naked. For US folks, a 2001-up B12N works great (has blinker mounts on it too). Then simply remove your fairing and all it's hardware and replace it with the naked parts.