Hey Seb.your belly pan is looks very much like mine,which i think is a powerbronze(bought it years ago and alas the memory aint what it used to be )as for filling the gap in front ,I used a piece of polypropalene plastic cut a fraction bigger than the profile of the belly pan and leaving a reasonable gap (don't want it melting)around the exhaust, it works fine it's been fitted a few years now and keeps most of the road filth off the engine and overheating isnt an issue(watercooled)...if you need any more info i'll gladly help
Cheers ChrisC
Seb,
I also think it's a Power Bronze lower fairing, as ChrisC says, and the same type as mine.
ChrisC how did you go about attaching the piece of polypropylene plastic
I'm intending to fit something to the front of mine when I get around to it. The only one I've seen that has something fitted at the front is this one in the pic below. It looks to be made from a thin sheet of aluminium imo.