RE: sapac typhoon
they actually come with the kit... pretty cool lol.
I'm sure you must be able to buy those sort of things separately, not sure where though. Perhaps someone else can help you out!
Tarro - looking sweet! IMO a bit of gunmetal on the exhaust tips would set it off a treat, but looks great as is. I'm thinking of trying to emulate this pantjob, might be a bit difficult to get a good result without an airbrush though. Still, can but try!