Where can I buy a dual push button specific to my toilet from? as mine has split and broken in 2 and I have tried for 6 months to find a supplier from whom I can purchase. My toilet is only 4 years old and was bought from bathstore.com in Leeds. They can offer no help and I really do not want to take off all the toilet, cut the sealer, get it level again, risk damaging my tiles etc which I would have to do if purchasing a new cistern which fit inside the tall narrow back of the toilet. I really just want to buy a push button and srcew it in. Please can anyone tell me of a supplier who can find unusual parts?