Gainsborough Showers: Spares and replacements Gainsborough Showers are manufactured by Aqualisa, we supply spares for the most popular models. Gainsborough Ambassador concealed spare parts £6.12 - £168.90 Gainsborough Ambassador exposed spare parts £6.12 - £168.90 022801 Gainsborough Diplomat cartridge £150.79 Aqualisa 215015/16 Wall outlet assembly, chrome or white £14.18 - £17.45