There’s a way. May be I was googling what I needed wrongly. Have found the mob that I want.

This mob can retrofit our front windows with double glazed glass. The kids should be happy. 

Now that there’s a bar across the road it’s even more noisy. Very happy. Another job crossed off on my list. Looks like it will be their Christmas pressie.

It’s taken me 6 years to solve this problem. I wonder how they will deal with the lead light bit? 

http://www.magnetite.com.au/services/residential.html

https://www.justrite.com.au/products-and-services/double-glazing-upvc-windows/what-is-retrofit-double-glazing/

Or this mob?

http://www.ecomaster.com.au/what-is-secondary-glazing/