I want to have a new shower unit fitted to replace my old one. Plumbing, electricals all in place. Just a question of fitting a new unit. How much do you think it would cost to get a new one fitted?
You'd need to see the old one and the new together to see if the connections are in a different place. Moving either water or electrical supply could involve altering the tiles, extending the services etc.
I'm afraid any figure given here would be meaningless otherwise.
I'm sorry I can't be of more help :o(