Is it likely to be the case that the original Kona Control Centre components are worm - after all they are 25 years old or is there possibly another problem?
It's very strange, I had recalled seeing a retailer photo without the ports too. I went to the service doc in the end which clarified things. Maybe they did omit them last year; puzzling!
Is your explosif black with pink and blue splatter paint on it or purple,reason being i asked is if it's purple it's a 91 and 1"1/8th headtube,if it's the latter i might be able to help out. I've taking the XT headset out of my 90 explosif which fitted snug,i can take some measurements to give you an idea.