Himalayan Crafts isn't a headshop but they might have the kits, I think it is more likely to get one in one of the Nirvana headshops, there is one in capel street, ones somewhere in Galway, Limerick, Derry and I think there is a new one in South William Street.
I know they do a load of things that are hard to find so I reckon this is your best shot.