I got a wine kit delivered but it arrived open and the Kieselsol, Chitosan and Stabliser had fallen out. Company who I bought it from were sound enough to send another kit. So now I have two kits but only one set of Kieselsol, Chitosan and Stabliser. Can I buy those separately anywhere? (I'm in Dublin) or can I use 1/2 of each sachet in each 4.5ltrs of wine juice? Or is there anything I can use from my beer equipment to replace the above missing additives.