Please help - bespoke, 2 storey aluminium window unit

Can anyone recommend me find a firm that can supply and install 2 storey bay with floor to ceiling aluminium windows and roof, as a single unit? The existing 2 storey bay will be demolished because we are installing "floor to ceiling height" windows and raising the height of the upper ceiling. The advice I have had is that it would be best if the new windows, frame and roof could be supplied and installed as a single unit - but I am having real difficulty finding someone to do the whole job (rather than just supply the windows).

I live in Epsom on the Surrey/London borders.

WML

perhaps you will have to go down the industrial route because of size!!!!

shop fitters!!! large panel manufacturers!!!

Thank you.