And how often do people try to spell it with an "e"
Mind you I once had a Chemistry teacher who took three attempts to spell Iain correctly - I wrote it down for him after the first one and he still couldn't copy it correctly onto his paperwork. Dr Einbaum I wonder what you are doing now? - probably retired long ago if he's even still with us.
I've just had a look on Merlin's website and don't see the bulges that are in the catalogue - odd. Failing any of the ones I've suggested stick "bonnet bulge" or "power bulge" into Google and you'll get plenty results (although some of them might not be work-safe). I'd suggest the kit-car world is your friend here as the ones designed for that market won't be made to fit the specific curve of another car's bonnet.
Personally I'd be making one as I've done a fair amount of fibreglass work on my GTM so I've got the stuff and know how easy it is.
Iain