looking for a complete kit of a Vulcano is as rare as looking for Hens teath..to find a set of fittings these days will be virtually impossible, as they have been out of production for at least 15 years.......sorry it's bad news but I'd be prepared to scratch build if I were you.
I had a kit of the model some time ago, and quite a few of the fittings are generic with other models at 1:48 scale in the Jotika range, but you'd need plans for that to check out which...but again, a lot would need to be scratch built I'm afraid.
neil.