The build

Wanting to fit them ourselves is almost as bigger stumbling block as our location. Lots of them really don’t like that.

I got my windows made...and had to get someone else to fit. Mine are wood though. Are you looking at plastic/double glazed?

Yeah we’re looking at upvc double or triple. We’d like triple if budget will allow.

We had to do single glazed here... but they did allow me to use double glazing in my roof light. 
I would try very small firms... they love the unusual.

#I would call rather than send an email - often people just send off emails to find price ranges and aren't interested in going any further. A telephone call usually means you are really interested.