Some polycarbonate plastic sheets will make up the “windows” which will slide to open / close. Surprisingly, I found these in Ireland, and more surprisingly was that they were cut to size and ready for collection the next morning – thank you guys from Access Plastics 🙂
The metal springs however were not so easy to source locally, as apparently this kind of DIY activities are not very common in Ireland (I eventually found them at Phibsboro Hardware).
