We recommend the follwoing 8.5 kW showers as suitable retro-fit replacements:
8.5 se - with a gloss white finish*
8.5 cse - with a satin chrome finish*
The Stanza range are also suitable replacements although it is likely that some altertions to the pipework and wiring may be required:
Stanza 8.5 white
Stanza 8.5 black