Sounds like you're in a real mess mate!
I don't know what a tanking kit is but I had a quick look for you on this website, seems to have come up with some stuff
http://www.plumbingsuppliesandfitti...search_results&search_terms=Baal+tanking+kit+
They seem to be pretty reasonable on price as well, so it should take a few quid off your total price.
Hope you get everything sorted soon mate, nothing worse than having a broken bathroom!
I don't know what a tanking kit is but I had a quick look for you on this website, seems to have come up with some stuff
http://www.plumbingsuppliesandfitti...search_results&search_terms=Baal+tanking+kit+
They seem to be pretty reasonable on price as well, so it should take a few quid off your total price.
Hope you get everything sorted soon mate, nothing worse than having a broken bathroom!