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Need tin-copper-indium bath or components

I heard about a white bronze solution which has a new alloy made of tin - copper - indium . This plating solution allows to plate several minutes and keep brightness with the use of the right additives , we look for : - the solution composition (oz/gal of potassium cyanide , potassium stannate , copper cyanide and indium sulphate ) - a additive supplier for this bath - a potassium stannate supplier ( in Brazil is very difficult to obtain this product ) also I am looking for a additive for alkaline copper that : keep brightness regardless the period of time the process takes, especially for barrel plating .

Thank you for your attention , I am looking forward to an answer from you best regards ,

Luiz Agenor Fraga
plating shop - caxias do sul, rio grande do sul, Brazil
2004