Combi boiler and power shower

[MaxP779]

I currently have a power shower and an old regular boiler, im getting a combi fitted within the next few months. Will this power shower have to go or will it still work, I know it will essentially be redundant as combis work at mains pressure and dont need a pump but im asking if it will definitely need to be replaced by a mixer shower or not?

 

[MaxP779]

Yeah its a power shower, defo not electric.

Looks like itll have to go then, any ideas how much it would cost to have a mixer shower fitted in its place? Assuming i buy the shower by myself somewhere.